/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/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:07:44,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:07:44,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:07:44,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:07:44,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:07:44,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:07:44,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:07:44,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:07:44,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:07:44,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:07:44,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:07:44,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:07:44,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:07:44,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:07:44,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:07:44,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:07:44,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:07:44,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:07:44,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:07:44,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:07:44,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:07:44,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:07:44,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:07:44,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:07:44,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:07:44,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:07:44,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:07:44,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:07:44,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:07:44,422 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:07:44,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:07:44,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:07:44,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:07:44,427 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:07:44,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:07:44,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:07:44,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:07:44,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:07:44,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:07:44,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:07:44,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:07:44,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:07:44,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:07:44,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:07:44,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:07:44,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:07:44,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:07:44,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:07:44,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:07:44,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:07:44,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:07:44,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:07:44,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:07:44,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:07:44,431 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:07:44,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:07:44,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:07:44,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:07:44,858 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:07:44,859 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:07:44,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2020-12-23 07:07:44,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ce20c416a/b26b6f3728bb407fbff9c161243484c5/FLAG06c3b1b03 [2020-12-23 07:07:45,518 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:07:45,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2020-12-23 07:07:45,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ce20c416a/b26b6f3728bb407fbff9c161243484c5/FLAG06c3b1b03 [2020-12-23 07:07:45,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ce20c416a/b26b6f3728bb407fbff9c161243484c5 [2020-12-23 07:07:45,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:07:45,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:07:45,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:45,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:07:45,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:07:45,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:45" (1/1) ... [2020-12-23 07:07:45,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3334ef3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:45, skipping insertion in model container [2020-12-23 07:07:45,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:45" (1/1) ... [2020-12-23 07:07:45,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:07:45,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:07:46,110 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 07:07:46,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:46,137 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:07:46,152 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 07:07:46,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:46,174 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:07:46,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46 WrapperNode [2020-12-23 07:07:46,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:46,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:46,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:07:46,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:07:46,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:46,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:07:46,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:07:46,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:07:46,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... [2020-12-23 07:07:46,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:07:46,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:07:46,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:07:46,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:07:46,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:46,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:07:46,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:07:46,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:07:46,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:07:46,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:07:46,683 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:07:46,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:46 BoogieIcfgContainer [2020-12-23 07:07:46,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:07:46,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:07:46,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:07:46,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:07:46,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:07:45" (1/3) ... [2020-12-23 07:07:46,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155c1d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:46, skipping insertion in model container [2020-12-23 07:07:46,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:46" (2/3) ... [2020-12-23 07:07:46,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155c1d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:46, skipping insertion in model container [2020-12-23 07:07:46,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:46" (3/3) ... [2020-12-23 07:07:46,695 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2020-12-23 07:07:46,703 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:07:46,712 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:07:46,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:07:46,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:07:46,771 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:07:46,775 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:07:46,775 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:07:46,776 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:07:46,776 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:07:46,776 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:07:46,776 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:07:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-23 07:07:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:07:46,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:46,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:07:46,871 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2020-12-23 07:07:46,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:46,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046729091] [2020-12-23 07:07:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:47,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046729091] [2020-12-23 07:07:47,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:47,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124577711] [2020-12-23 07:07:47,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:47,130 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-12-23 07:07:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:47,183 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-12-23 07:07:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:47,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 07:07:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:47,194 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:07:47,195 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:07:47,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:07:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:07:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:07:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 07:07:47,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2020-12-23 07:07:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:47,235 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 07:07:47,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 07:07:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:07:47,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:47,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:47,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:07:47,237 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:47,238 INFO L82 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2020-12-23 07:07:47,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:47,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562070975] [2020-12-23 07:07:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562070975] [2020-12-23 07:07:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552813792] [2020-12-23 07:07:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:07:47,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:47,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:47,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:07:47,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939215109] [2020-12-23 07:07:47,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:07:47,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:07:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:07:47,460 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2020-12-23 07:07:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:47,524 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2020-12-23 07:07:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:07:47,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 07:07:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:47,526 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:07:47,527 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 07:07:47,529 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 [2020-12-23 07:07:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 07:07:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 07:07:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:07:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 07:07:47,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-12-23 07:07:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:47,539 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 07:07:47,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:07:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 07:07:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:07:47,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:47,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:47,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:07:47,758 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:47,760 INFO L82 PathProgramCache]: Analyzing trace with hash 742447134, now seen corresponding path program 2 times [2020-12-23 07:07:47,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:47,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585237054] [2020-12-23 07:07:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:07:47,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585237054] [2020-12-23 07:07:47,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:47,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:47,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150827382] [2020-12-23 07:07:47,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:47,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:47,801 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-12-23 07:07:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:47,834 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2020-12-23 07:07:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:47,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 07:07:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:47,836 INFO L225 Difference]: With dead ends: 25 [2020-12-23 07:07:47,836 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:07:47,836 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 [2020-12-23 07:07:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:07:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:07:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:07:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-23 07:07:47,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2020-12-23 07:07:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:47,841 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-23 07:07:47,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-23 07:07:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:07:47,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:47,842 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:47,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:07:47,843 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash 833658279, now seen corresponding path program 1 times [2020-12-23 07:07:47,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:47,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726547952] [2020-12-23 07:07:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:47,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726547952] [2020-12-23 07:07:47,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:47,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:47,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317193553] [2020-12-23 07:07:47,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:47,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:47,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:47,889 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-12-23 07:07:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:47,934 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-23 07:07:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:47,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 07:07:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:47,937 INFO L225 Difference]: With dead ends: 25 [2020-12-23 07:07:47,938 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:07:47,938 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 [2020-12-23 07:07:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:07:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-23 07:07:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:07:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 07:07:47,944 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-12-23 07:07:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:47,945 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 07:07:47,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:47,945 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 07:07:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:07:47,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:47,946 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:47,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 07:07:47,947 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:47,948 INFO L82 PathProgramCache]: Analyzing trace with hash -894818322, now seen corresponding path program 1 times [2020-12-23 07:07:47,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:47,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988464899] [2020-12-23 07:07:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:48,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988464899] [2020-12-23 07:07:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240631451] [2020-12-23 07:07:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:48,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:48,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:07:48,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717547787] [2020-12-23 07:07:48,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:07:48,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:48,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:07:48,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:07:48,216 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2020-12-23 07:07:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:48,278 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-23 07:07:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:07:48,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-23 07:07:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:48,281 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:07:48,281 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:07:48,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:07:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:07:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 07:07:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:07:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 07:07:48,287 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-12-23 07:07:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:48,288 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 07:07:48,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:07:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 07:07:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:07:48,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:48,289 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:48,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:48,503 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -550986095, now seen corresponding path program 2 times [2020-12-23 07:07:48,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:48,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378803722] [2020-12-23 07:07:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:48,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378803722] [2020-12-23 07:07:48,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168004222] [2020-12-23 07:07:48,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:48,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:48,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:48,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:07:48,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710636483] [2020-12-23 07:07:48,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:07:48,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:48,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:07:48,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:48,743 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-12-23 07:07:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:48,813 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-12-23 07:07:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:07:48,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 07:07:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:48,816 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:07:48,816 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:07:48,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:07:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:07:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:07:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 07:07:48,822 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2020-12-23 07:07:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:48,823 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 07:07:48,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:07:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 07:07:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:07:48,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:48,824 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:49,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:49,038 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash -840697740, now seen corresponding path program 3 times [2020-12-23 07:07:49,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:49,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884675189] [2020-12-23 07:07:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:49,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884675189] [2020-12-23 07:07:49,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196448084] [2020-12-23 07:07:49,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:49,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:07:49,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:07:49,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:49,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-12-23 07:07:49,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733453214] [2020-12-23 07:07:49,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:07:49,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:07:49,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:49,293 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2020-12-23 07:07:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:49,381 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-12-23 07:07:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:07:49,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 07:07:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:49,383 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:07:49,383 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:07:49,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:07:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-23 07:07:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:07:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-23 07:07:49,391 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2020-12-23 07:07:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:49,391 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-23 07:07:49,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:07:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-23 07:07:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:07:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:49,393 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:49,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:49,599 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1104906274, now seen corresponding path program 4 times [2020-12-23 07:07:49,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:49,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507320836] [2020-12-23 07:07:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:49,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507320836] [2020-12-23 07:07:49,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524273764] [2020-12-23 07:07:49,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:49,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:49,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:49,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:49,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:49,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:07:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165827656] [2020-12-23 07:07:49,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:07:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:49,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:07:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:49,882 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 9 states. [2020-12-23 07:07:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:49,981 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-12-23 07:07:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:07:49,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 07:07:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:49,983 INFO L225 Difference]: With dead ends: 48 [2020-12-23 07:07:49,984 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:07:49,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:07:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 07:07:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:07:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 07:07:50,003 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 28 [2020-12-23 07:07:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:50,004 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 07:07:50,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:07:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 07:07:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:07:50,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:50,006 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:50,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:50,222 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash 86326977, now seen corresponding path program 5 times [2020-12-23 07:07:50,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:50,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419836726] [2020-12-23 07:07:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:50,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419836726] [2020-12-23 07:07:50,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631940616] [2020-12-23 07:07:50,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:50,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:07:50,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:50,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:50,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 58 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:50,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:50,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2020-12-23 07:07:50,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425134195] [2020-12-23 07:07:50,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:07:50,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:50,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:07:50,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:50,470 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2020-12-23 07:07:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:50,547 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-12-23 07:07:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:07:50,548 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-12-23 07:07:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:50,549 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:07:50,549 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:07:50,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:07:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:07:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:07:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-12-23 07:07:50,556 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 30 [2020-12-23 07:07:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:50,556 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-12-23 07:07:50,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:07:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-12-23 07:07:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:07:50,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:50,558 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:50,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:50,772 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:50,773 INFO L82 PathProgramCache]: Analyzing trace with hash 924487030, now seen corresponding path program 6 times [2020-12-23 07:07:50,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:50,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748552116] [2020-12-23 07:07:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:07:50,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748552116] [2020-12-23 07:07:50,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138756517] [2020-12-23 07:07:50,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:50,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:07:50,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-23 07:07:51,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:51,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2020-12-23 07:07:51,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103601923] [2020-12-23 07:07:51,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:07:51,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:51,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:07:51,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:51,091 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 13 states. [2020-12-23 07:07:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:51,206 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-23 07:07:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:07:51,206 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-12-23 07:07:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:51,207 INFO L225 Difference]: With dead ends: 74 [2020-12-23 07:07:51,207 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:07:51,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:07:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-12-23 07:07:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:07:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-12-23 07:07:51,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 40 [2020-12-23 07:07:51,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:51,215 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-12-23 07:07:51,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:07:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-12-23 07:07:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:07:51,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:51,217 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:51,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:07:51,431 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1446918432, now seen corresponding path program 7 times [2020-12-23 07:07:51,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:51,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690881713] [2020-12-23 07:07:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:07:51,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690881713] [2020-12-23 07:07:51,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132400601] [2020-12-23 07:07:51,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:07:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:07:51,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:51,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:07:51,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234300649] [2020-12-23 07:07:51,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:07:51,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:51,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:07:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:51,673 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2020-12-23 07:07:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:51,731 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-12-23 07:07:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:07:51,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-23 07:07:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:51,732 INFO L225 Difference]: With dead ends: 78 [2020-12-23 07:07:51,732 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:07:51,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:07:51,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 07:07:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:07:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-12-23 07:07:51,740 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 46 [2020-12-23 07:07:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:51,740 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-12-23 07:07:51,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:07:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-12-23 07:07:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:07:51,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:51,742 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:51,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 07:07:51,956 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:51,957 INFO L82 PathProgramCache]: Analyzing trace with hash 49163587, now seen corresponding path program 8 times [2020-12-23 07:07:51,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:51,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592684910] [2020-12-23 07:07:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:07:52,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592684910] [2020-12-23 07:07:52,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41342230] [2020-12-23 07:07:52,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:52,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:52,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:52,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:07:52,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:52,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:07:52,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982003553] [2020-12-23 07:07:52,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:07:52,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:52,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:07:52,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:52,282 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 13 states. [2020-12-23 07:07:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:52,338 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-12-23 07:07:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:07:52,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-12-23 07:07:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:52,342 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:07:52,342 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:07:52,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:07:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 07:07:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:07:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-12-23 07:07:52,357 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 48 [2020-12-23 07:07:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:52,357 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-12-23 07:07:52,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:07:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-12-23 07:07:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:07:52,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:52,360 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:52,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:52,575 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1131521190, now seen corresponding path program 9 times [2020-12-23 07:07:52,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:52,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117098186] [2020-12-23 07:07:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:07:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117098186] [2020-12-23 07:07:52,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011392369] [2020-12-23 07:07:52,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:52,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 07:07:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:07:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 108 proven. 18 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 07:07:52,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:52,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-12-23 07:07:52,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108887587] [2020-12-23 07:07:52,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:07:52,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:52,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:07:52,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:07:52,900 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 17 states. [2020-12-23 07:07:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:53,018 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2020-12-23 07:07:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:07:53,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-12-23 07:07:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:53,019 INFO L225 Difference]: With dead ends: 88 [2020-12-23 07:07:53,019 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:07:53,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:07:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:07:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-12-23 07:07:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 07:07:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-12-23 07:07:53,028 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 50 [2020-12-23 07:07:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:53,028 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-12-23 07:07:53,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:07:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-12-23 07:07:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 07:07:53,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:53,029 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:53,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:53,245 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2091337584, now seen corresponding path program 10 times [2020-12-23 07:07:53,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:53,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978664388] [2020-12-23 07:07:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:07:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978664388] [2020-12-23 07:07:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969479758] [2020-12-23 07:07:53,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:53,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:07:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:07:53,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:53,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:07:53,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541159842] [2020-12-23 07:07:53,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:07:53,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:07:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:53,534 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 15 states. [2020-12-23 07:07:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:53,603 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-12-23 07:07:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:07:53,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-12-23 07:07:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:53,604 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:07:53,604 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:07:53,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:07:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 07:07:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:07:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-23 07:07:53,611 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 56 [2020-12-23 07:07:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:53,611 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-23 07:07:53,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:07:53,611 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-23 07:07:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 07:07:53,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:53,612 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:53,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:07:53,827 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:53,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1226040077, now seen corresponding path program 11 times [2020-12-23 07:07:53,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:53,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542013228] [2020-12-23 07:07:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:07:53,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542013228] [2020-12-23 07:07:53,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469786964] [2020-12-23 07:07:53,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:54,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 07:07:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:07:54,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 256 proven. 39 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-23 07:07:54,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:54,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-23 07:07:54,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532456888] [2020-12-23 07:07:54,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:54,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:54,195 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 21 states. [2020-12-23 07:07:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:54,304 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2020-12-23 07:07:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:54,304 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-12-23 07:07:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:54,305 INFO L225 Difference]: With dead ends: 106 [2020-12-23 07:07:54,305 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 07:07:54,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 07:07:54,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-23 07:07:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 07:07:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-12-23 07:07:54,314 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 58 [2020-12-23 07:07:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:54,314 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-12-23 07:07:54,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-12-23 07:07:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 07:07:54,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:54,316 INFO L422 BasicCegarLoop]: trace histogram [23, 13, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:54,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:07:54,529 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash 468942769, now seen corresponding path program 12 times [2020-12-23 07:07:54,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:54,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977175154] [2020-12-23 07:07:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-12-23 07:07:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977175154] [2020-12-23 07:07:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675809998] [2020-12-23 07:07:54,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:54,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:07:54,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:54,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:54,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 220 proven. 32 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2020-12-23 07:07:54,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:54,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2020-12-23 07:07:54,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60141732] [2020-12-23 07:07:54,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:54,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:54,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:54,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:54,965 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 21 states. [2020-12-23 07:07:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:55,092 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2020-12-23 07:07:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:55,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-12-23 07:07:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:55,094 INFO L225 Difference]: With dead ends: 126 [2020-12-23 07:07:55,094 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:07:55,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:07:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-12-23 07:07:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 07:07:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2020-12-23 07:07:55,102 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 72 [2020-12-23 07:07:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:55,103 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2020-12-23 07:07:55,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2020-12-23 07:07:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 07:07:55,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:55,104 INFO L422 BasicCegarLoop]: trace histogram [25, 14, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:55,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:07:55,312 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:55,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2141632037, now seen corresponding path program 13 times [2020-12-23 07:07:55,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:55,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761558078] [2020-12-23 07:07:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 07:07:55,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761558078] [2020-12-23 07:07:55,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178272967] [2020-12-23 07:07:55,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:55,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:07:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 07:07:55,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:55,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:07:55,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435768767] [2020-12-23 07:07:55,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:07:55,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:55,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:07:55,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:55,740 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 18 states. [2020-12-23 07:07:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:55,831 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2020-12-23 07:07:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:07:55,833 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-12-23 07:07:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:55,835 INFO L225 Difference]: With dead ends: 130 [2020-12-23 07:07:55,835 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:07:55,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:07:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 07:07:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:07:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-12-23 07:07:55,862 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 78 [2020-12-23 07:07:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:55,862 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-12-23 07:07:55,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:07:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-12-23 07:07:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 07:07:55,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:55,867 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:56,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:56,068 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2068319746, now seen corresponding path program 14 times [2020-12-23 07:07:56,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:56,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164906381] [2020-12-23 07:07:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 07:07:56,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164906381] [2020-12-23 07:07:56,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701268207] [2020-12-23 07:07:56,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:56,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:56,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:07:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 07:07:56,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:56,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:07:56,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959384788] [2020-12-23 07:07:56,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:07:56,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:07:56,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:56,450 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 19 states. [2020-12-23 07:07:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:56,521 INFO L93 Difference]: Finished difference Result 132 states and 165 transitions. [2020-12-23 07:07:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:07:56,521 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-12-23 07:07:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:56,525 INFO L225 Difference]: With dead ends: 132 [2020-12-23 07:07:56,525 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 07:07:56,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 07:07:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-23 07:07:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:07:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-23 07:07:56,538 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 80 [2020-12-23 07:07:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:56,539 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-23 07:07:56,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:07:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-23 07:07:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 07:07:56,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:56,540 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:56,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:07:56,755 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:56,756 INFO L82 PathProgramCache]: Analyzing trace with hash -334684831, now seen corresponding path program 15 times [2020-12-23 07:07:56,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:56,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578704513] [2020-12-23 07:07:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 07:07:56,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578704513] [2020-12-23 07:07:56,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993006902] [2020-12-23 07:07:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 07:07:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:07:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 302 proven. 50 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2020-12-23 07:07:57,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:57,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2020-12-23 07:07:57,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707998938] [2020-12-23 07:07:57,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:07:57,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:07:57,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:57,260 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 25 states. [2020-12-23 07:07:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:57,410 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2020-12-23 07:07:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:07:57,411 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 82 [2020-12-23 07:07:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:57,412 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:07:57,412 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 07:07:57,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 07:07:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-12-23 07:07:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 07:07:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-12-23 07:07:57,419 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 82 [2020-12-23 07:07:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:57,419 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-12-23 07:07:57,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:07:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-12-23 07:07:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 07:07:57,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:57,421 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:57,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:57,636 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash -209842229, now seen corresponding path program 16 times [2020-12-23 07:07:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:57,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636931700] [2020-12-23 07:07:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 07:07:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636931700] [2020-12-23 07:07:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311612036] [2020-12-23 07:07:57,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:57,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:07:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 07:07:58,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:58,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:07:58,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215860313] [2020-12-23 07:07:58,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:58,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:58,051 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 21 states. [2020-12-23 07:07:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:58,153 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2020-12-23 07:07:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:07:58,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 88 [2020-12-23 07:07:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:58,155 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:07:58,155 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 07:07:58,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 07:07:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-23 07:07:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 07:07:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-12-23 07:07:58,162 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 88 [2020-12-23 07:07:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:58,163 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-12-23 07:07:58,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-12-23 07:07:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 07:07:58,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:58,165 INFO L422 BasicCegarLoop]: trace histogram [30, 18, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:58,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:58,380 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 183445550, now seen corresponding path program 17 times [2020-12-23 07:07:58,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:58,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325879944] [2020-12-23 07:07:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 437 proven. 342 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 07:07:58,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325879944] [2020-12-23 07:07:58,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111838907] [2020-12-23 07:07:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:58,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-23 07:07:58,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:58,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 634 proven. 108 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-23 07:07:59,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:59,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-23 07:07:59,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170797222] [2020-12-23 07:07:59,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:07:59,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:59,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:07:59,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:07:59,036 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 30 states. [2020-12-23 07:07:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:59,188 INFO L93 Difference]: Finished difference Result 158 states and 201 transitions. [2020-12-23 07:07:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:07:59,189 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2020-12-23 07:07:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:59,190 INFO L225 Difference]: With dead ends: 158 [2020-12-23 07:07:59,190 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 07:07:59,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:07:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 07:07:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-23 07:07:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 07:07:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-12-23 07:07:59,197 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 90 [2020-12-23 07:07:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:59,197 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-12-23 07:07:59,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:07:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-12-23 07:07:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 07:07:59,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:59,199 INFO L422 BasicCegarLoop]: trace histogram [34, 19, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:59,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:07:59,413 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1801676692, now seen corresponding path program 18 times [2020-12-23 07:07:59,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:59,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133964543] [2020-12-23 07:07:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 580 proven. 380 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-12-23 07:07:59,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133964543] [2020-12-23 07:07:59,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576682249] [2020-12-23 07:07:59,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:59,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2020-12-23 07:07:59,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:07:59,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 474 proven. 72 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-12-23 07:08:00,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:00,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2020-12-23 07:08:00,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263973218] [2020-12-23 07:08:00,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:08:00,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:08:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:08:00,258 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 29 states. [2020-12-23 07:08:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:00,434 INFO L93 Difference]: Finished difference Result 178 states and 226 transitions. [2020-12-23 07:08:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:08:00,435 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 104 [2020-12-23 07:08:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:00,436 INFO L225 Difference]: With dead ends: 178 [2020-12-23 07:08:00,436 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:08:00,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:08:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:08:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-12-23 07:08:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 07:08:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2020-12-23 07:08:00,443 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 104 [2020-12-23 07:08:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:00,443 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2020-12-23 07:08:00,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:08:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2020-12-23 07:08:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 07:08:00,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:00,444 INFO L422 BasicCegarLoop]: trace histogram [36, 20, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:00,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:00,658 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1191362282, now seen corresponding path program 19 times [2020-12-23 07:08:00,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:00,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055843427] [2020-12-23 07:08:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 651 proven. 420 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-12-23 07:08:00,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055843427] [2020-12-23 07:08:00,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927658668] [2020-12-23 07:08:00,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:08:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 651 proven. 420 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-12-23 07:08:01,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:01,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:08:01,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681043541] [2020-12-23 07:08:01,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:08:01,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:01,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:08:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:08:01,169 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 24 states. [2020-12-23 07:08:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:01,240 INFO L93 Difference]: Finished difference Result 182 states and 229 transitions. [2020-12-23 07:08:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:08:01,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2020-12-23 07:08:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:01,242 INFO L225 Difference]: With dead ends: 182 [2020-12-23 07:08:01,242 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:08:01,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:08:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:08:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-12-23 07:08:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 07:08:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-12-23 07:08:01,248 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 110 [2020-12-23 07:08:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:01,248 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-12-23 07:08:01,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:08:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-12-23 07:08:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 07:08:01,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:01,250 INFO L422 BasicCegarLoop]: trace histogram [37, 21, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:01,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:08:01,466 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:01,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1925538503, now seen corresponding path program 20 times [2020-12-23 07:08:01,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:01,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537438023] [2020-12-23 07:08:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 682 proven. 462 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-12-23 07:08:01,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537438023] [2020-12-23 07:08:01,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161928104] [2020-12-23 07:08:01,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:01,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:01,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:01,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:08:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 682 proven. 462 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-12-23 07:08:01,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:01,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:08:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300762819] [2020-12-23 07:08:01,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:08:01,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:08:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:08:01,994 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 25 states. [2020-12-23 07:08:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:02,073 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-12-23 07:08:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:08:02,073 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2020-12-23 07:08:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:02,074 INFO L225 Difference]: With dead ends: 184 [2020-12-23 07:08:02,074 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 07:08:02,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:08:02,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 07:08:02,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-23 07:08:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 07:08:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2020-12-23 07:08:02,080 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 112 [2020-12-23 07:08:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:02,080 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2020-12-23 07:08:02,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:08:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2020-12-23 07:08:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 07:08:02,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:02,082 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:02,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:08:02,297 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1200716956, now seen corresponding path program 21 times [2020-12-23 07:08:02,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:02,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993006838] [2020-12-23 07:08:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 713 proven. 506 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-12-23 07:08:02,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993006838] [2020-12-23 07:08:02,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196115988] [2020-12-23 07:08:02,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:02,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 07:08:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:02,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:08:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 592 proven. 98 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2020-12-23 07:08:03,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:03,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2020-12-23 07:08:03,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918183759] [2020-12-23 07:08:03,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:08:03,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:03,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:08:03,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:03,068 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 33 states. [2020-12-23 07:08:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:03,261 INFO L93 Difference]: Finished difference Result 192 states and 244 transitions. [2020-12-23 07:08:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:08:03,261 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 114 [2020-12-23 07:08:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:03,263 INFO L225 Difference]: With dead ends: 192 [2020-12-23 07:08:03,263 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 07:08:03,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 07:08:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-12-23 07:08:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 07:08:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2020-12-23 07:08:03,269 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 114 [2020-12-23 07:08:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:03,270 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2020-12-23 07:08:03,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:08:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2020-12-23 07:08:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 07:08:03,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:03,271 INFO L422 BasicCegarLoop]: trace histogram [40, 23, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:03,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:03,484 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:03,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1524960646, now seen corresponding path program 22 times [2020-12-23 07:08:03,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:03,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947348941] [2020-12-23 07:08:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 792 proven. 552 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-23 07:08:03,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947348941] [2020-12-23 07:08:03,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31730066] [2020-12-23 07:08:03,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:03,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:08:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 792 proven. 552 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-23 07:08:04,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:04,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:08:04,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773277357] [2020-12-23 07:08:04,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:08:04,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:04,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:08:04,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:08:04,123 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand 27 states. [2020-12-23 07:08:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:04,264 INFO L93 Difference]: Finished difference Result 196 states and 247 transitions. [2020-12-23 07:08:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:08:04,264 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 120 [2020-12-23 07:08:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:04,265 INFO L225 Difference]: With dead ends: 196 [2020-12-23 07:08:04,265 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 07:08:04,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:08:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 07:08:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-12-23 07:08:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 07:08:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2020-12-23 07:08:04,272 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 120 [2020-12-23 07:08:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:04,273 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2020-12-23 07:08:04,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:08:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2020-12-23 07:08:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 07:08:04,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:04,274 INFO L422 BasicCegarLoop]: trace histogram [41, 24, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:04,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:08:04,489 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1382275561, now seen corresponding path program 23 times [2020-12-23 07:08:04,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:04,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984469768] [2020-12-23 07:08:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 825 proven. 600 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-23 07:08:04,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984469768] [2020-12-23 07:08:04,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140443131] [2020-12-23 07:08:04,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:05,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-23 07:08:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:08:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1198 proven. 237 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-12-23 07:08:05,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:05,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2020-12-23 07:08:05,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193659682] [2020-12-23 07:08:05,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:08:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:05,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:08:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:05,578 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand 40 states. [2020-12-23 07:08:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:05,794 INFO L93 Difference]: Finished difference Result 214 states and 273 transitions. [2020-12-23 07:08:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:08:05,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 122 [2020-12-23 07:08:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:05,796 INFO L225 Difference]: With dead ends: 214 [2020-12-23 07:08:05,796 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 07:08:05,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 07:08:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-12-23 07:08:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 07:08:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 170 transitions. [2020-12-23 07:08:05,803 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 170 transitions. Word has length 122 [2020-12-23 07:08:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:05,803 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 170 transitions. [2020-12-23 07:08:05,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:08:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 170 transitions. [2020-12-23 07:08:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 07:08:05,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:05,805 INFO L422 BasicCegarLoop]: trace histogram [46, 25, 21, 21, 13, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:06,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:06,019 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1821448016, now seen corresponding path program 24 times [2020-12-23 07:08:06,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:06,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893062512] [2020-12-23 07:08:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-12-23 07:08:06,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893062512] [2020-12-23 07:08:06,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823645322] [2020-12-23 07:08:06,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:06,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2020-12-23 07:08:06,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:06,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:08:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 858 proven. 128 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2020-12-23 07:08:07,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:07,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2020-12-23 07:08:07,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815200412] [2020-12-23 07:08:07,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:08:07,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:08:07,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:07,049 INFO L87 Difference]: Start difference. First operand 141 states and 170 transitions. Second operand 37 states. [2020-12-23 07:08:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:07,270 INFO L93 Difference]: Finished difference Result 238 states and 302 transitions. [2020-12-23 07:08:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:08:07,271 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 140 [2020-12-23 07:08:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:07,272 INFO L225 Difference]: With dead ends: 238 [2020-12-23 07:08:07,272 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 07:08:07,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 07:08:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-12-23 07:08:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 07:08:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2020-12-23 07:08:07,279 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 140 [2020-12-23 07:08:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:07,279 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2020-12-23 07:08:07,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:08:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2020-12-23 07:08:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 07:08:07,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:07,281 INFO L422 BasicCegarLoop]: trace histogram [48, 26, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:07,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:08:07,496 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:07,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1202562598, now seen corresponding path program 25 times [2020-12-23 07:08:07,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:07,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589348451] [2020-12-23 07:08:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-12-23 07:08:07,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589348451] [2020-12-23 07:08:07,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672448439] [2020-12-23 07:08:07,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:08,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:08:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-12-23 07:08:08,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:08,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 07:08:08,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075338240] [2020-12-23 07:08:08,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:08:08,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:08,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:08:08,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:08:08,194 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand 30 states. [2020-12-23 07:08:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:08,333 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2020-12-23 07:08:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:08:08,334 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2020-12-23 07:08:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:08,335 INFO L225 Difference]: With dead ends: 242 [2020-12-23 07:08:08,335 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 07:08:08,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:08:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 07:08:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-12-23 07:08:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 07:08:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2020-12-23 07:08:08,341 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 146 [2020-12-23 07:08:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:08,341 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2020-12-23 07:08:08,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:08:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2020-12-23 07:08:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 07:08:08,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:08,343 INFO L422 BasicCegarLoop]: trace histogram [49, 27, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:08,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:08:08,558 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash -234643331, now seen corresponding path program 26 times [2020-12-23 07:08:08,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:08,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220563336] [2020-12-23 07:08:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-12-23 07:08:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220563336] [2020-12-23 07:08:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034423570] [2020-12-23 07:08:09,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:09,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:09,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:09,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:08:09,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-12-23 07:08:09,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:09,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:08:09,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067861152] [2020-12-23 07:08:09,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:08:09,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:08:09,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:09,273 INFO L87 Difference]: Start difference. First operand 149 states and 180 transitions. Second operand 31 states. [2020-12-23 07:08:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:09,379 INFO L93 Difference]: Finished difference Result 244 states and 307 transitions. [2020-12-23 07:08:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:08:09,379 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2020-12-23 07:08:09,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:09,381 INFO L225 Difference]: With dead ends: 244 [2020-12-23 07:08:09,381 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 07:08:09,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 07:08:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-12-23 07:08:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 07:08:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2020-12-23 07:08:09,387 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 148 [2020-12-23 07:08:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:09,387 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2020-12-23 07:08:09,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:08:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2020-12-23 07:08:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 07:08:09,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:09,388 INFO L422 BasicCegarLoop]: trace histogram [50, 28, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:09,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:09,604 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2072130976, now seen corresponding path program 27 times [2020-12-23 07:08:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:09,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835653250] [2020-12-23 07:08:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-12-23 07:08:10,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835653250] [2020-12-23 07:08:10,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653255356] [2020-12-23 07:08:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:10,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-12-23 07:08:10,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:10,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:08:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1016 proven. 162 refuted. 0 times theorem prover too weak. 1784 trivial. 0 not checked. [2020-12-23 07:08:10,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:10,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2020-12-23 07:08:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387557232] [2020-12-23 07:08:10,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:08:10,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:08:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:08:10,723 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand 41 states. [2020-12-23 07:08:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:10,991 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2020-12-23 07:08:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:08:10,992 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 150 [2020-12-23 07:08:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:10,993 INFO L225 Difference]: With dead ends: 252 [2020-12-23 07:08:10,993 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 07:08:10,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:08:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 07:08:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-12-23 07:08:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:08:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 190 transitions. [2020-12-23 07:08:11,000 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 190 transitions. Word has length 150 [2020-12-23 07:08:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:11,000 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 190 transitions. [2020-12-23 07:08:11,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:08:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 190 transitions. [2020-12-23 07:08:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 07:08:11,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:11,001 INFO L422 BasicCegarLoop]: trace histogram [52, 29, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:11,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:11,215 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:11,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2077115338, now seen corresponding path program 28 times [2020-12-23 07:08:11,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:11,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226800321] [2020-12-23 07:08:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-12-23 07:08:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226800321] [2020-12-23 07:08:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442982882] [2020-12-23 07:08:11,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:11,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:11,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:08:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-12-23 07:08:12,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:12,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 07:08:12,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092148223] [2020-12-23 07:08:12,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:08:12,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:12,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:08:12,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:12,018 INFO L87 Difference]: Start difference. First operand 157 states and 190 transitions. Second operand 33 states. [2020-12-23 07:08:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:12,188 INFO L93 Difference]: Finished difference Result 256 states and 323 transitions. [2020-12-23 07:08:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:08:12,189 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-12-23 07:08:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:12,190 INFO L225 Difference]: With dead ends: 256 [2020-12-23 07:08:12,190 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 07:08:12,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 07:08:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-12-23 07:08:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 07:08:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 192 transitions. [2020-12-23 07:08:12,197 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 192 transitions. Word has length 156 [2020-12-23 07:08:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:12,198 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 192 transitions. [2020-12-23 07:08:12,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:08:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 192 transitions. [2020-12-23 07:08:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 07:08:12,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:12,204 INFO L422 BasicCegarLoop]: trace histogram [53, 30, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:12,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 07:08:12,418 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:12,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1656609453, now seen corresponding path program 29 times [2020-12-23 07:08:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:12,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649584892] [2020-12-23 07:08:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 1395 proven. 930 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-12-23 07:08:13,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649584892] [2020-12-23 07:08:13,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648633650] [2020-12-23 07:08:13,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:13,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 07:08:13,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:13,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:08:13,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 2010 proven. 441 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-12-23 07:08:14,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:14,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2020-12-23 07:08:14,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041243366] [2020-12-23 07:08:14,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 07:08:14,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 07:08:14,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:08:14,018 INFO L87 Difference]: Start difference. First operand 159 states and 192 transitions. Second operand 50 states. [2020-12-23 07:08:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:14,275 INFO L93 Difference]: Finished difference Result 274 states and 349 transitions. [2020-12-23 07:08:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:08:14,276 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 158 [2020-12-23 07:08:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:14,277 INFO L225 Difference]: With dead ends: 274 [2020-12-23 07:08:14,277 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 07:08:14,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:08:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 07:08:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-12-23 07:08:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 07:08:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 214 transitions. [2020-12-23 07:08:14,285 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 214 transitions. Word has length 158 [2020-12-23 07:08:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:14,286 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 214 transitions. [2020-12-23 07:08:14,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 07:08:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 214 transitions. [2020-12-23 07:08:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 07:08:14,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:14,287 INFO L422 BasicCegarLoop]: trace histogram [58, 31, 27, 27, 17, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:14,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:14,500 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 788038644, now seen corresponding path program 30 times [2020-12-23 07:08:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:14,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678851803] [2020-12-23 07:08:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1696 proven. 992 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2020-12-23 07:08:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678851803] [2020-12-23 07:08:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240031737] [2020-12-23 07:08:15,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:15,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 07:08:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:08:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1354 proven. 200 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2020-12-23 07:08:15,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:15,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2020-12-23 07:08:15,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855621604] [2020-12-23 07:08:15,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:08:15,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:15,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:08:15,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:15,935 INFO L87 Difference]: Start difference. First operand 177 states and 214 transitions. Second operand 45 states. [2020-12-23 07:08:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:16,253 INFO L93 Difference]: Finished difference Result 298 states and 378 transitions. [2020-12-23 07:08:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:08:16,253 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 176 [2020-12-23 07:08:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:16,255 INFO L225 Difference]: With dead ends: 298 [2020-12-23 07:08:16,255 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 07:08:16,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 07:08:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2020-12-23 07:08:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 07:08:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 222 transitions. [2020-12-23 07:08:16,263 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 222 transitions. Word has length 176 [2020-12-23 07:08:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:16,264 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 222 transitions. [2020-12-23 07:08:16,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:08:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 222 transitions. [2020-12-23 07:08:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-23 07:08:16,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:16,265 INFO L422 BasicCegarLoop]: trace histogram [60, 32, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:16,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:08:16,479 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash -944898658, now seen corresponding path program 31 times [2020-12-23 07:08:16,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:16,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305748744] [2020-12-23 07:08:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-12-23 07:08:17,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305748744] [2020-12-23 07:08:17,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277652702] [2020-12-23 07:08:17,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:08:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-12-23 07:08:17,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:17,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 07:08:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204724856] [2020-12-23 07:08:17,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:08:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:08:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:08:17,484 INFO L87 Difference]: Start difference. First operand 183 states and 222 transitions. Second operand 36 states. [2020-12-23 07:08:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:17,610 INFO L93 Difference]: Finished difference Result 302 states and 381 transitions. [2020-12-23 07:08:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:08:17,611 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 182 [2020-12-23 07:08:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:17,612 INFO L225 Difference]: With dead ends: 302 [2020-12-23 07:08:17,612 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 07:08:17,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:08:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 07:08:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-12-23 07:08:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 07:08:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2020-12-23 07:08:17,619 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 182 [2020-12-23 07:08:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:17,619 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2020-12-23 07:08:17,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:08:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2020-12-23 07:08:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 07:08:17,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:17,620 INFO L422 BasicCegarLoop]: trace histogram [61, 33, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:17,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:08:17,834 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:17,835 INFO L82 PathProgramCache]: Analyzing trace with hash 613412545, now seen corresponding path program 32 times [2020-12-23 07:08:17,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:17,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866425749] [2020-12-23 07:08:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-12-23 07:08:18,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866425749] [2020-12-23 07:08:18,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733503518] [2020-12-23 07:08:18,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:18,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:08:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-12-23 07:08:18,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:18,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 07:08:18,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77890549] [2020-12-23 07:08:18,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:08:18,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:08:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:18,857 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand 37 states. [2020-12-23 07:08:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:19,029 INFO L93 Difference]: Finished difference Result 304 states and 383 transitions. [2020-12-23 07:08:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:08:19,030 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 184 [2020-12-23 07:08:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:19,031 INFO L225 Difference]: With dead ends: 304 [2020-12-23 07:08:19,031 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 07:08:19,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 07:08:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-12-23 07:08:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 07:08:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2020-12-23 07:08:19,038 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 184 [2020-12-23 07:08:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:19,038 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2020-12-23 07:08:19,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:08:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2020-12-23 07:08:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 07:08:19,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:19,040 INFO L422 BasicCegarLoop]: trace histogram [62, 34, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:19,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:08:19,255 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:19,256 INFO L82 PathProgramCache]: Analyzing trace with hash -793107676, now seen corresponding path program 33 times [2020-12-23 07:08:19,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:19,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084581404] [2020-12-23 07:08:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1925 proven. 1190 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-12-23 07:08:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084581404] [2020-12-23 07:08:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110596925] [2020-12-23 07:08:20,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:20,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 07:08:20,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:20,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:08:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1552 proven. 242 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2020-12-23 07:08:20,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:20,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2020-12-23 07:08:20,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782174190] [2020-12-23 07:08:20,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:08:20,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:20,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:08:20,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:20,912 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand 49 states. [2020-12-23 07:08:21,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:21,179 INFO L93 Difference]: Finished difference Result 312 states and 396 transitions. [2020-12-23 07:08:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 07:08:21,180 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 186 [2020-12-23 07:08:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:21,181 INFO L225 Difference]: With dead ends: 312 [2020-12-23 07:08:21,181 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 07:08:21,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 07:08:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2020-12-23 07:08:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 07:08:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 234 transitions. [2020-12-23 07:08:21,189 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 234 transitions. Word has length 186 [2020-12-23 07:08:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:21,189 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 234 transitions. [2020-12-23 07:08:21,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:08:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 234 transitions. [2020-12-23 07:08:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-23 07:08:21,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:21,191 INFO L422 BasicCegarLoop]: trace histogram [64, 35, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:21,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:08:21,406 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1274624754, now seen corresponding path program 34 times [2020-12-23 07:08:21,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:21,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613552711] [2020-12-23 07:08:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2020-12-23 07:08:22,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613552711] [2020-12-23 07:08:22,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104296572] [2020-12-23 07:08:22,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:22,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:22,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:22,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:08:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2020-12-23 07:08:22,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:22,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 07:08:22,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767400301] [2020-12-23 07:08:22,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:08:22,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:22,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:08:22,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:08:22,525 INFO L87 Difference]: Start difference. First operand 193 states and 234 transitions. Second operand 39 states. [2020-12-23 07:08:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:22,723 INFO L93 Difference]: Finished difference Result 316 states and 399 transitions. [2020-12-23 07:08:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:08:22,723 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2020-12-23 07:08:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:22,724 INFO L225 Difference]: With dead ends: 316 [2020-12-23 07:08:22,725 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 07:08:22,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:08:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 07:08:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2020-12-23 07:08:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 07:08:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2020-12-23 07:08:22,732 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 192 [2020-12-23 07:08:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:22,732 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2020-12-23 07:08:22,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:08:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2020-12-23 07:08:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 07:08:22,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:22,734 INFO L422 BasicCegarLoop]: trace histogram [65, 36, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:22,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:08:22,948 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash -751573391, now seen corresponding path program 35 times [2020-12-23 07:08:22,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:22,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403326286] [2020-12-23 07:08:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 2109 proven. 1332 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2020-12-23 07:08:23,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403326286] [2020-12-23 07:08:23,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212007429] [2020-12-23 07:08:23,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:23,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-23 07:08:23,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:23,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:08:23,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 3030 proven. 709 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2020-12-23 07:08:25,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:25,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 23] total 60 [2020-12-23 07:08:25,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948529226] [2020-12-23 07:08:25,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:08:25,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:25,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:08:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:08:25,358 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand 60 states. [2020-12-23 07:08:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:25,752 INFO L93 Difference]: Finished difference Result 334 states and 425 transitions. [2020-12-23 07:08:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:08:25,752 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 194 [2020-12-23 07:08:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:25,754 INFO L225 Difference]: With dead ends: 334 [2020-12-23 07:08:25,754 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 07:08:25,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:08:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 07:08:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-12-23 07:08:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-23 07:08:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 258 transitions. [2020-12-23 07:08:25,763 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 258 transitions. Word has length 194 [2020-12-23 07:08:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:25,763 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 258 transitions. [2020-12-23 07:08:25,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:08:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 258 transitions. [2020-12-23 07:08:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-23 07:08:25,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:25,765 INFO L422 BasicCegarLoop]: trace histogram [70, 37, 33, 33, 21, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:25,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:08:25,965 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:25,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1941116360, now seen corresponding path program 36 times [2020-12-23 07:08:25,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:25,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881787938] [2020-12-23 07:08:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2020-12-23 07:08:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881787938] [2020-12-23 07:08:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84263711] [2020-12-23 07:08:27,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:27,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2020-12-23 07:08:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:27,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:08:27,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 1962 proven. 288 refuted. 0 times theorem prover too weak. 3706 trivial. 0 not checked. [2020-12-23 07:08:28,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:28,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2020-12-23 07:08:28,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689069604] [2020-12-23 07:08:28,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 07:08:28,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 07:08:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:08:28,088 INFO L87 Difference]: Start difference. First operand 213 states and 258 transitions. Second operand 53 states. [2020-12-23 07:08:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:28,424 INFO L93 Difference]: Finished difference Result 358 states and 454 transitions. [2020-12-23 07:08:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:08:28,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 212 [2020-12-23 07:08:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:28,427 INFO L225 Difference]: With dead ends: 358 [2020-12-23 07:08:28,427 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 07:08:28,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:08:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 07:08:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2020-12-23 07:08:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-23 07:08:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 266 transitions. [2020-12-23 07:08:28,438 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 266 transitions. Word has length 212 [2020-12-23 07:08:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:28,438 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 266 transitions. [2020-12-23 07:08:28,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 07:08:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 266 transitions. [2020-12-23 07:08:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-23 07:08:28,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:28,441 INFO L422 BasicCegarLoop]: trace histogram [72, 38, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:28,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:08:28,654 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1358713758, now seen corresponding path program 37 times [2020-12-23 07:08:28,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:28,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308615175] [2020-12-23 07:08:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-23 07:08:29,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308615175] [2020-12-23 07:08:29,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110085048] [2020-12-23 07:08:29,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:29,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:08:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-23 07:08:29,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:29,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 07:08:29,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502553937] [2020-12-23 07:08:29,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:08:29,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:08:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:08:29,957 INFO L87 Difference]: Start difference. First operand 219 states and 266 transitions. Second operand 42 states. [2020-12-23 07:08:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:30,140 INFO L93 Difference]: Finished difference Result 362 states and 457 transitions. [2020-12-23 07:08:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:08:30,142 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 218 [2020-12-23 07:08:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:30,144 INFO L225 Difference]: With dead ends: 362 [2020-12-23 07:08:30,144 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 07:08:30,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:08:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 07:08:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-12-23 07:08:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-23 07:08:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 268 transitions. [2020-12-23 07:08:30,151 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 268 transitions. Word has length 218 [2020-12-23 07:08:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:30,152 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 268 transitions. [2020-12-23 07:08:30,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:08:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 268 transitions. [2020-12-23 07:08:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-23 07:08:30,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:30,153 INFO L422 BasicCegarLoop]: trace histogram [73, 39, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:30,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:30,368 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1653405691, now seen corresponding path program 38 times [2020-12-23 07:08:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:30,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410631556] [2020-12-23 07:08:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-23 07:08:31,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410631556] [2020-12-23 07:08:31,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923818120] [2020-12-23 07:08:31,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:31,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:31,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:08:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-23 07:08:31,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:31,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 07:08:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869512376] [2020-12-23 07:08:31,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:08:31,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:08:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:08:31,682 INFO L87 Difference]: Start difference. First operand 221 states and 268 transitions. Second operand 43 states. [2020-12-23 07:08:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:31,840 INFO L93 Difference]: Finished difference Result 364 states and 459 transitions. [2020-12-23 07:08:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:08:31,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 220 [2020-12-23 07:08:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:31,842 INFO L225 Difference]: With dead ends: 364 [2020-12-23 07:08:31,843 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 07:08:31,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:08:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 07:08:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-12-23 07:08:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 07:08:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 270 transitions. [2020-12-23 07:08:31,851 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 270 transitions. Word has length 220 [2020-12-23 07:08:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:31,851 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 270 transitions. [2020-12-23 07:08:31,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:08:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 270 transitions. [2020-12-23 07:08:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-23 07:08:31,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:31,853 INFO L422 BasicCegarLoop]: trace histogram [74, 40, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:32,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:32,066 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1384511768, now seen corresponding path program 39 times [2020-12-23 07:08:32,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:32,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579826799] [2020-12-23 07:08:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-23 07:08:33,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579826799] [2020-12-23 07:08:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646680765] [2020-12-23 07:08:33,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:33,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 07:08:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:08:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2200 proven. 338 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2020-12-23 07:08:34,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:34,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2020-12-23 07:08:34,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221408625] [2020-12-23 07:08:34,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:08:34,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:08:34,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:08:34,280 INFO L87 Difference]: Start difference. First operand 223 states and 270 transitions. Second operand 57 states. [2020-12-23 07:08:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:34,630 INFO L93 Difference]: Finished difference Result 372 states and 472 transitions. [2020-12-23 07:08:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:08:34,631 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2020-12-23 07:08:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:34,633 INFO L225 Difference]: With dead ends: 372 [2020-12-23 07:08:34,633 INFO L226 Difference]: Without dead ends: 231 [2020-12-23 07:08:34,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:08:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-23 07:08:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-12-23 07:08:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 07:08:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 278 transitions. [2020-12-23 07:08:34,640 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 278 transitions. Word has length 222 [2020-12-23 07:08:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:34,640 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 278 transitions. [2020-12-23 07:08:34,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:08:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 278 transitions. [2020-12-23 07:08:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-23 07:08:34,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:34,642 INFO L422 BasicCegarLoop]: trace histogram [76, 41, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:34,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:34,855 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:34,856 INFO L82 PathProgramCache]: Analyzing trace with hash -811462318, now seen corresponding path program 40 times [2020-12-23 07:08:34,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:34,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173604791] [2020-12-23 07:08:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2020-12-23 07:08:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173604791] [2020-12-23 07:08:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798095978] [2020-12-23 07:08:36,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:36,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:36,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:36,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:08:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2020-12-23 07:08:36,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:36,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 07:08:36,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157788755] [2020-12-23 07:08:36,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:08:36,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:36,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:08:36,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:36,358 INFO L87 Difference]: Start difference. First operand 229 states and 278 transitions. Second operand 45 states. [2020-12-23 07:08:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:36,640 INFO L93 Difference]: Finished difference Result 376 states and 475 transitions. [2020-12-23 07:08:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:08:36,641 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 228 [2020-12-23 07:08:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:36,643 INFO L225 Difference]: With dead ends: 376 [2020-12-23 07:08:36,643 INFO L226 Difference]: Without dead ends: 231 [2020-12-23 07:08:36,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-23 07:08:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2020-12-23 07:08:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-23 07:08:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 280 transitions. [2020-12-23 07:08:36,652 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 280 transitions. Word has length 228 [2020-12-23 07:08:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:36,652 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 280 transitions. [2020-12-23 07:08:36,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:08:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 280 transitions. [2020-12-23 07:08:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-23 07:08:36,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:36,654 INFO L422 BasicCegarLoop]: trace histogram [77, 42, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:36,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 07:08:36,867 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -663126731, now seen corresponding path program 41 times [2020-12-23 07:08:36,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:36,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413390984] [2020-12-23 07:08:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 2967 proven. 1806 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2020-12-23 07:08:38,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413390984] [2020-12-23 07:08:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401168002] [2020-12-23 07:08:38,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:38,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2020-12-23 07:08:38,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:38,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:08:38,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 4258 proven. 1041 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-23 07:08:40,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:40,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 27] total 70 [2020-12-23 07:08:40,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900830562] [2020-12-23 07:08:40,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 07:08:40,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 07:08:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:08:40,215 INFO L87 Difference]: Start difference. First operand 231 states and 280 transitions. Second operand 70 states. [2020-12-23 07:08:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:40,681 INFO L93 Difference]: Finished difference Result 394 states and 501 transitions. [2020-12-23 07:08:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 07:08:40,681 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 230 [2020-12-23 07:08:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:40,684 INFO L225 Difference]: With dead ends: 394 [2020-12-23 07:08:40,684 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 07:08:40,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:08:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 07:08:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2020-12-23 07:08:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-23 07:08:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 302 transitions. [2020-12-23 07:08:40,691 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 302 transitions. Word has length 230 [2020-12-23 07:08:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:40,692 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 302 transitions. [2020-12-23 07:08:40,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 07:08:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 302 transitions. [2020-12-23 07:08:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-23 07:08:40,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:40,693 INFO L422 BasicCegarLoop]: trace histogram [82, 43, 39, 39, 25, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:40,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:40,907 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:40,908 INFO L82 PathProgramCache]: Analyzing trace with hash 29334396, now seen corresponding path program 42 times [2020-12-23 07:08:40,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:40,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975001728] [2020-12-23 07:08:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 3388 proven. 1892 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-12-23 07:08:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975001728] [2020-12-23 07:08:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879689961] [2020-12-23 07:08:42,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:42,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2020-12-23 07:08:42,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:08:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 2682 proven. 392 refuted. 0 times theorem prover too weak. 5132 trivial. 0 not checked. [2020-12-23 07:08:43,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:43,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2020-12-23 07:08:43,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573038989] [2020-12-23 07:08:43,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:08:43,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:43,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:08:43,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:08:43,570 INFO L87 Difference]: Start difference. First operand 249 states and 302 transitions. Second operand 61 states. [2020-12-23 07:08:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:44,013 INFO L93 Difference]: Finished difference Result 418 states and 530 transitions. [2020-12-23 07:08:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 07:08:44,013 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 248 [2020-12-23 07:08:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:44,015 INFO L225 Difference]: With dead ends: 418 [2020-12-23 07:08:44,015 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 07:08:44,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:08:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 07:08:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2020-12-23 07:08:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-23 07:08:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 310 transitions. [2020-12-23 07:08:44,024 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 310 transitions. Word has length 248 [2020-12-23 07:08:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:44,024 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 310 transitions. [2020-12-23 07:08:44,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:08:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 310 transitions. [2020-12-23 07:08:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-23 07:08:44,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:44,026 INFO L422 BasicCegarLoop]: trace histogram [84, 44, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:44,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:44,241 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash -142154202, now seen corresponding path program 43 times [2020-12-23 07:08:44,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:44,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692483457] [2020-12-23 07:08:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2020-12-23 07:08:45,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692483457] [2020-12-23 07:08:45,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249713889] [2020-12-23 07:08:45,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:45,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:08:45,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2020-12-23 07:08:45,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:45,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 07:08:45,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354233581] [2020-12-23 07:08:45,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:08:45,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:08:45,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:45,889 INFO L87 Difference]: Start difference. First operand 255 states and 310 transitions. Second operand 48 states. [2020-12-23 07:08:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:46,134 INFO L93 Difference]: Finished difference Result 422 states and 533 transitions. [2020-12-23 07:08:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:08:46,134 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 254 [2020-12-23 07:08:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:46,136 INFO L225 Difference]: With dead ends: 422 [2020-12-23 07:08:46,136 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 07:08:46,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 07:08:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-12-23 07:08:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-23 07:08:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 312 transitions. [2020-12-23 07:08:46,145 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 312 transitions. Word has length 254 [2020-12-23 07:08:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:46,145 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 312 transitions. [2020-12-23 07:08:46,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:08:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 312 transitions. [2020-12-23 07:08:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-23 07:08:46,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:46,147 INFO L422 BasicCegarLoop]: trace histogram [85, 45, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:46,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 07:08:46,361 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash -964662199, now seen corresponding path program 44 times [2020-12-23 07:08:46,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:46,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929578320] [2020-12-23 07:08:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2020-12-23 07:08:47,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929578320] [2020-12-23 07:08:47,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834231163] [2020-12-23 07:08:47,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:08:47,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:47,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:47,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:08:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2020-12-23 07:08:48,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:48,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 07:08:48,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174835342] [2020-12-23 07:08:48,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:08:48,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:48,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:08:48,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:48,086 INFO L87 Difference]: Start difference. First operand 257 states and 312 transitions. Second operand 49 states. [2020-12-23 07:08:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:48,342 INFO L93 Difference]: Finished difference Result 424 states and 535 transitions. [2020-12-23 07:08:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:08:48,343 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 256 [2020-12-23 07:08:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:48,344 INFO L225 Difference]: With dead ends: 424 [2020-12-23 07:08:48,344 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 07:08:48,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 07:08:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-12-23 07:08:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 07:08:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 314 transitions. [2020-12-23 07:08:48,352 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 314 transitions. Word has length 256 [2020-12-23 07:08:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:48,352 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 314 transitions. [2020-12-23 07:08:48,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:08:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 314 transitions. [2020-12-23 07:08:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-23 07:08:48,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:48,362 INFO L422 BasicCegarLoop]: trace histogram [86, 46, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:48,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:08:48,564 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1120864852, now seen corresponding path program 45 times [2020-12-23 07:08:48,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:48,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475912246] [2020-12-23 07:08:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 3713 proven. 2162 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2020-12-23 07:08:50,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475912246] [2020-12-23 07:08:50,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211094137] [2020-12-23 07:08:50,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:50,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2020-12-23 07:08:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:50,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:08:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 2960 proven. 450 refuted. 0 times theorem prover too weak. 5546 trivial. 0 not checked. [2020-12-23 07:08:51,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:51,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2020-12-23 07:08:51,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852881181] [2020-12-23 07:08:51,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 07:08:51,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:51,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 07:08:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:08:51,547 INFO L87 Difference]: Start difference. First operand 259 states and 314 transitions. Second operand 65 states. [2020-12-23 07:08:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:51,992 INFO L93 Difference]: Finished difference Result 432 states and 548 transitions. [2020-12-23 07:08:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:08:51,993 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 258 [2020-12-23 07:08:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:51,995 INFO L225 Difference]: With dead ends: 432 [2020-12-23 07:08:51,995 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 07:08:51,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:08:51,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 07:08:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2020-12-23 07:08:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-23 07:08:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 322 transitions. [2020-12-23 07:08:52,003 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 322 transitions. Word has length 258 [2020-12-23 07:08:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:52,004 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 322 transitions. [2020-12-23 07:08:52,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 07:08:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 322 transitions. [2020-12-23 07:08:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-12-23 07:08:52,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:52,006 INFO L422 BasicCegarLoop]: trace histogram [88, 47, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:52,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:08:52,215 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1274259606, now seen corresponding path program 46 times [2020-12-23 07:08:52,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:52,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940748719] [2020-12-23 07:08:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2020-12-23 07:08:53,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940748719] [2020-12-23 07:08:53,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043401756] [2020-12-23 07:08:53,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:53,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:53,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:08:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2020-12-23 07:08:54,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:54,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 07:08:54,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185861366] [2020-12-23 07:08:54,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:08:54,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:08:54,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:08:54,125 INFO L87 Difference]: Start difference. First operand 265 states and 322 transitions. Second operand 51 states. [2020-12-23 07:08:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:54,440 INFO L93 Difference]: Finished difference Result 436 states and 551 transitions. [2020-12-23 07:08:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:08:54,441 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 264 [2020-12-23 07:08:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:54,442 INFO L225 Difference]: With dead ends: 436 [2020-12-23 07:08:54,442 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 07:08:54,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:08:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 07:08:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2020-12-23 07:08:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 07:08:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 324 transitions. [2020-12-23 07:08:54,451 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 324 transitions. Word has length 264 [2020-12-23 07:08:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:54,451 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 324 transitions. [2020-12-23 07:08:54,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:08:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 324 transitions. [2020-12-23 07:08:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-23 07:08:54,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:54,453 INFO L422 BasicCegarLoop]: trace histogram [89, 48, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:54,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:54,667 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2004738311, now seen corresponding path program 47 times [2020-12-23 07:08:54,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:54,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287207869] [2020-12-23 07:08:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 3969 proven. 2352 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2020-12-23 07:08:56,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287207869] [2020-12-23 07:08:56,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902208874] [2020-12-23 07:08:56,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:56,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2020-12-23 07:08:56,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:56,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:08:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 5694 proven. 1437 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2020-12-23 07:08:58,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:58,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 31] total 80 [2020-12-23 07:08:58,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628264913] [2020-12-23 07:08:58,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 07:08:58,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 07:08:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:08:58,934 INFO L87 Difference]: Start difference. First operand 267 states and 324 transitions. Second operand 80 states. [2020-12-23 07:08:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:59,496 INFO L93 Difference]: Finished difference Result 454 states and 577 transitions. [2020-12-23 07:08:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:08:59,497 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 266 [2020-12-23 07:08:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:59,499 INFO L225 Difference]: With dead ends: 454 [2020-12-23 07:08:59,499 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 07:08:59,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:08:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 07:08:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2020-12-23 07:08:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-23 07:08:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 346 transitions. [2020-12-23 07:08:59,507 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 346 transitions. Word has length 266 [2020-12-23 07:08:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:59,507 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 346 transitions. [2020-12-23 07:08:59,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 07:08:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 346 transitions. [2020-12-23 07:08:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-12-23 07:08:59,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:59,509 INFO L422 BasicCegarLoop]: trace histogram [94, 49, 45, 45, 29, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:59,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:59,725 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1994659776, now seen corresponding path program 48 times [2020-12-23 07:08:59,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:59,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309711932] [2020-12-23 07:08:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4450 proven. 2450 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2020-12-23 07:09:01,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309711932] [2020-12-23 07:09:01,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680002559] [2020-12-23 07:09:01,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:01,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 07:09:01,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:09:01,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3514 proven. 512 refuted. 0 times theorem prover too weak. 6790 trivial. 0 not checked. [2020-12-23 07:09:03,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:03,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2020-12-23 07:09:03,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16049236] [2020-12-23 07:09:03,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:09:03,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:09:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:03,159 INFO L87 Difference]: Start difference. First operand 285 states and 346 transitions. Second operand 69 states. [2020-12-23 07:09:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:03,596 INFO L93 Difference]: Finished difference Result 478 states and 606 transitions. [2020-12-23 07:09:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:09:03,597 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 284 [2020-12-23 07:09:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:03,598 INFO L225 Difference]: With dead ends: 478 [2020-12-23 07:09:03,598 INFO L226 Difference]: Without dead ends: 293 [2020-12-23 07:09:03,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-23 07:09:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2020-12-23 07:09:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-23 07:09:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2020-12-23 07:09:03,607 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 284 [2020-12-23 07:09:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:03,608 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2020-12-23 07:09:03,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:09:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2020-12-23 07:09:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-12-23 07:09:03,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:03,610 INFO L422 BasicCegarLoop]: trace histogram [96, 50, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:03,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:03,826 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1269508842, now seen corresponding path program 49 times [2020-12-23 07:09:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:03,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733539487] [2020-12-23 07:09:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2020-12-23 07:09:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733539487] [2020-12-23 07:09:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875007991] [2020-12-23 07:09:05,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:09:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2020-12-23 07:09:05,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:05,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 07:09:05,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049420289] [2020-12-23 07:09:05,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:09:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:09:05,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:09:05,987 INFO L87 Difference]: Start difference. First operand 291 states and 354 transitions. Second operand 54 states. [2020-12-23 07:09:06,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:06,225 INFO L93 Difference]: Finished difference Result 482 states and 609 transitions. [2020-12-23 07:09:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:09:06,226 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 290 [2020-12-23 07:09:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:06,228 INFO L225 Difference]: With dead ends: 482 [2020-12-23 07:09:06,228 INFO L226 Difference]: Without dead ends: 293 [2020-12-23 07:09:06,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:09:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-23 07:09:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2020-12-23 07:09:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-12-23 07:09:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 356 transitions. [2020-12-23 07:09:06,237 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 356 transitions. Word has length 290 [2020-12-23 07:09:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:06,237 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 356 transitions. [2020-12-23 07:09:06,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:09:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 356 transitions. [2020-12-23 07:09:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-12-23 07:09:06,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:06,239 INFO L422 BasicCegarLoop]: trace histogram [97, 51, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:06,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:06,454 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1523293069, now seen corresponding path program 50 times [2020-12-23 07:09:06,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:06,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222717265] [2020-12-23 07:09:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2020-12-23 07:09:08,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222717265] [2020-12-23 07:09:08,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74687729] [2020-12-23 07:09:08,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:08,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:08,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:08,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:09:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2020-12-23 07:09:08,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:08,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 07:09:08,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057350523] [2020-12-23 07:09:08,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:09:08,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:09:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:09:08,710 INFO L87 Difference]: Start difference. First operand 293 states and 356 transitions. Second operand 55 states. [2020-12-23 07:09:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:09,010 INFO L93 Difference]: Finished difference Result 484 states and 611 transitions. [2020-12-23 07:09:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:09:09,011 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 292 [2020-12-23 07:09:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:09,013 INFO L225 Difference]: With dead ends: 484 [2020-12-23 07:09:09,013 INFO L226 Difference]: Without dead ends: 295 [2020-12-23 07:09:09,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:09:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-12-23 07:09:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-12-23 07:09:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-23 07:09:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 358 transitions. [2020-12-23 07:09:09,021 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 358 transitions. Word has length 292 [2020-12-23 07:09:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:09,021 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 358 transitions. [2020-12-23 07:09:09,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:09:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 358 transitions. [2020-12-23 07:09:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-12-23 07:09:09,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:09,023 INFO L422 BasicCegarLoop]: trace histogram [98, 52, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:09,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 07:09:09,238 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:09,239 INFO L82 PathProgramCache]: Analyzing trace with hash 596799344, now seen corresponding path program 51 times [2020-12-23 07:09:09,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:09,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38268731] [2020-12-23 07:09:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 4823 proven. 2756 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2020-12-23 07:09:11,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38268731] [2020-12-23 07:09:11,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513978174] [2020-12-23 07:09:11,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:11,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-12-23 07:09:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:09:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 3832 proven. 578 refuted. 0 times theorem prover too weak. 7264 trivial. 0 not checked. [2020-12-23 07:09:12,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:12,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 20] total 73 [2020-12-23 07:09:12,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305975105] [2020-12-23 07:09:12,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 07:09:12,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:12,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 07:09:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:09:12,863 INFO L87 Difference]: Start difference. First operand 295 states and 358 transitions. Second operand 73 states. [2020-12-23 07:09:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:13,441 INFO L93 Difference]: Finished difference Result 492 states and 624 transitions. [2020-12-23 07:09:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 07:09:13,442 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 294 [2020-12-23 07:09:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:13,444 INFO L225 Difference]: With dead ends: 492 [2020-12-23 07:09:13,444 INFO L226 Difference]: Without dead ends: 303 [2020-12-23 07:09:13,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:09:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-12-23 07:09:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2020-12-23 07:09:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-23 07:09:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 366 transitions. [2020-12-23 07:09:13,451 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 366 transitions. Word has length 294 [2020-12-23 07:09:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:13,451 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 366 transitions. [2020-12-23 07:09:13,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 07:09:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 366 transitions. [2020-12-23 07:09:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-12-23 07:09:13,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:13,453 INFO L422 BasicCegarLoop]: trace histogram [100, 53, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:13,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:13,662 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:13,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1215362342, now seen corresponding path program 52 times [2020-12-23 07:09:13,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:13,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985871223] [2020-12-23 07:09:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2020-12-23 07:09:15,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985871223] [2020-12-23 07:09:15,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126585053] [2020-12-23 07:09:15,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:15,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:15,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 07:09:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2020-12-23 07:09:16,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:16,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 07:09:16,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147216498] [2020-12-23 07:09:16,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:09:16,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:09:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:09:16,016 INFO L87 Difference]: Start difference. First operand 301 states and 366 transitions. Second operand 57 states. [2020-12-23 07:09:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:16,256 INFO L93 Difference]: Finished difference Result 496 states and 627 transitions. [2020-12-23 07:09:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:09:16,257 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 300 [2020-12-23 07:09:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:16,259 INFO L225 Difference]: With dead ends: 496 [2020-12-23 07:09:16,259 INFO L226 Difference]: Without dead ends: 303 [2020-12-23 07:09:16,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:09:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-12-23 07:09:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2020-12-23 07:09:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-23 07:09:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 368 transitions. [2020-12-23 07:09:16,265 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 368 transitions. Word has length 300 [2020-12-23 07:09:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:16,265 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 368 transitions. [2020-12-23 07:09:16,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:09:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 368 transitions. [2020-12-23 07:09:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-12-23 07:09:16,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:16,266 INFO L422 BasicCegarLoop]: trace histogram [101, 54, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:16,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:09:16,467 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:16,468 INFO L82 PathProgramCache]: Analyzing trace with hash 981552061, now seen corresponding path program 53 times [2020-12-23 07:09:16,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:16,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778560137] [2020-12-23 07:09:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 5115 proven. 2970 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2020-12-23 07:09:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778560137] [2020-12-23 07:09:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705288168] [2020-12-23 07:09:18,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:18,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2020-12-23 07:09:18,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:09:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 7338 proven. 1897 refuted. 0 times theorem prover too weak. 3128 trivial. 0 not checked. [2020-12-23 07:09:21,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:21,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 35] total 90 [2020-12-23 07:09:21,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509981610] [2020-12-23 07:09:21,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-23 07:09:21,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-23 07:09:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:09:21,939 INFO L87 Difference]: Start difference. First operand 303 states and 368 transitions. Second operand 90 states. [2020-12-23 07:09:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:22,666 INFO L93 Difference]: Finished difference Result 514 states and 653 transitions. [2020-12-23 07:09:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-23 07:09:22,667 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 302 [2020-12-23 07:09:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:22,669 INFO L225 Difference]: With dead ends: 514 [2020-12-23 07:09:22,669 INFO L226 Difference]: Without dead ends: 321 [2020-12-23 07:09:22,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:09:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-23 07:09:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2020-12-23 07:09:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-12-23 07:09:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 390 transitions. [2020-12-23 07:09:22,678 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 390 transitions. Word has length 302 [2020-12-23 07:09:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:22,678 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 390 transitions. [2020-12-23 07:09:22,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-23 07:09:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 390 transitions. [2020-12-23 07:09:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-12-23 07:09:22,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:22,680 INFO L422 BasicCegarLoop]: trace histogram [106, 55, 51, 51, 33, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:22,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:09:22,896 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -997335292, now seen corresponding path program 54 times [2020-12-23 07:09:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:22,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111639456] [2020-12-23 07:09:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 5656 proven. 3080 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2020-12-23 07:09:25,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111639456] [2020-12-23 07:09:25,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519245625] [2020-12-23 07:09:25,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:25,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2020-12-23 07:09:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:09:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 4458 proven. 648 refuted. 0 times theorem prover too weak. 8680 trivial. 0 not checked. [2020-12-23 07:09:27,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:27,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 21] total 77 [2020-12-23 07:09:27,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420140204] [2020-12-23 07:09:27,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 07:09:27,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 07:09:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 07:09:27,155 INFO L87 Difference]: Start difference. First operand 321 states and 390 transitions. Second operand 77 states. [2020-12-23 07:09:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:27,691 INFO L93 Difference]: Finished difference Result 538 states and 682 transitions. [2020-12-23 07:09:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 07:09:27,692 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 320 [2020-12-23 07:09:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:27,694 INFO L225 Difference]: With dead ends: 538 [2020-12-23 07:09:27,694 INFO L226 Difference]: Without dead ends: 329 [2020-12-23 07:09:27,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 07:09:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-23 07:09:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2020-12-23 07:09:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-23 07:09:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 398 transitions. [2020-12-23 07:09:27,703 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 398 transitions. Word has length 320 [2020-12-23 07:09:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:27,704 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 398 transitions. [2020-12-23 07:09:27,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 07:09:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 398 transitions. [2020-12-23 07:09:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-23 07:09:27,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:27,706 INFO L422 BasicCegarLoop]: trace histogram [108, 56, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:27,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:27,920 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash -685507922, now seen corresponding path program 55 times [2020-12-23 07:09:27,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:27,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31799853] [2020-12-23 07:09:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2020-12-23 07:09:30,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31799853] [2020-12-23 07:09:30,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499532245] [2020-12-23 07:09:30,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:30,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:09:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2020-12-23 07:09:30,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:30,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 07:09:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146665631] [2020-12-23 07:09:30,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:09:30,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:30,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:09:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:09:30,584 INFO L87 Difference]: Start difference. First operand 327 states and 398 transitions. Second operand 60 states. [2020-12-23 07:09:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:30,825 INFO L93 Difference]: Finished difference Result 542 states and 685 transitions. [2020-12-23 07:09:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:09:30,826 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 326 [2020-12-23 07:09:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:30,828 INFO L225 Difference]: With dead ends: 542 [2020-12-23 07:09:30,828 INFO L226 Difference]: Without dead ends: 329 [2020-12-23 07:09:30,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:09:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-23 07:09:30,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2020-12-23 07:09:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-12-23 07:09:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 400 transitions. [2020-12-23 07:09:30,837 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 400 transitions. Word has length 326 [2020-12-23 07:09:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:30,837 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 400 transitions. [2020-12-23 07:09:30,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:09:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 400 transitions. [2020-12-23 07:09:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-23 07:09:30,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:30,840 INFO L422 BasicCegarLoop]: trace histogram [109, 57, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:31,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 07:09:31,053 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash -962062895, now seen corresponding path program 56 times [2020-12-23 07:09:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:31,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402888577] [2020-12-23 07:09:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2020-12-23 07:09:33,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402888577] [2020-12-23 07:09:33,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967868606] [2020-12-23 07:09:33,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:33,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:09:33,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2020-12-23 07:09:33,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:33,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 07:09:33,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19854830] [2020-12-23 07:09:33,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:09:33,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:09:33,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:09:33,846 INFO L87 Difference]: Start difference. First operand 329 states and 400 transitions. Second operand 61 states. [2020-12-23 07:09:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:34,103 INFO L93 Difference]: Finished difference Result 544 states and 687 transitions. [2020-12-23 07:09:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:09:34,104 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 328 [2020-12-23 07:09:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:34,106 INFO L225 Difference]: With dead ends: 544 [2020-12-23 07:09:34,106 INFO L226 Difference]: Without dead ends: 331 [2020-12-23 07:09:34,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:09:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-23 07:09:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2020-12-23 07:09:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-23 07:09:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 402 transitions. [2020-12-23 07:09:34,113 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 402 transitions. Word has length 328 [2020-12-23 07:09:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:34,113 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 402 transitions. [2020-12-23 07:09:34,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:09:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 402 transitions. [2020-12-23 07:09:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-23 07:09:34,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:34,116 INFO L422 BasicCegarLoop]: trace histogram [110, 58, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:34,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:34,330 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:34,331 INFO L82 PathProgramCache]: Analyzing trace with hash -443419596, now seen corresponding path program 57 times [2020-12-23 07:09:34,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:34,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520445862] [2020-12-23 07:09:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 6077 proven. 3422 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2020-12-23 07:09:36,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520445862] [2020-12-23 07:09:36,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093174864] [2020-12-23 07:09:36,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:36,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 07:09:36,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:09:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 4816 proven. 722 refuted. 0 times theorem prover too weak. 9214 trivial. 0 not checked. [2020-12-23 07:09:38,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:38,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 22] total 81 [2020-12-23 07:09:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888914452] [2020-12-23 07:09:38,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 07:09:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 07:09:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:09:38,934 INFO L87 Difference]: Start difference. First operand 331 states and 402 transitions. Second operand 81 states. [2020-12-23 07:09:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:39,509 INFO L93 Difference]: Finished difference Result 552 states and 700 transitions. [2020-12-23 07:09:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 07:09:39,510 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 330 [2020-12-23 07:09:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:39,512 INFO L225 Difference]: With dead ends: 552 [2020-12-23 07:09:39,512 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 07:09:39,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:09:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 07:09:39,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2020-12-23 07:09:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-23 07:09:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 410 transitions. [2020-12-23 07:09:39,521 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 410 transitions. Word has length 330 [2020-12-23 07:09:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:39,521 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 410 transitions. [2020-12-23 07:09:39,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 07:09:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 410 transitions. [2020-12-23 07:09:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-23 07:09:39,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:39,523 INFO L422 BasicCegarLoop]: trace histogram [112, 59, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:39,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-12-23 07:09:39,739 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash 306690078, now seen corresponding path program 58 times [2020-12-23 07:09:39,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:39,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089278923] [2020-12-23 07:09:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2020-12-23 07:09:42,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089278923] [2020-12-23 07:09:42,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467712587] [2020-12-23 07:09:42,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:42,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:09:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2020-12-23 07:09:42,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:42,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 07:09:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195068818] [2020-12-23 07:09:42,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:09:42,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:42,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:09:42,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:42,702 INFO L87 Difference]: Start difference. First operand 337 states and 410 transitions. Second operand 63 states. [2020-12-23 07:09:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:43,099 INFO L93 Difference]: Finished difference Result 556 states and 703 transitions. [2020-12-23 07:09:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:09:43,100 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 336 [2020-12-23 07:09:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:43,102 INFO L225 Difference]: With dead ends: 556 [2020-12-23 07:09:43,102 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 07:09:43,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 07:09:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2020-12-23 07:09:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-12-23 07:09:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 412 transitions. [2020-12-23 07:09:43,109 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 412 transitions. Word has length 336 [2020-12-23 07:09:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:43,109 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 412 transitions. [2020-12-23 07:09:43,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:09:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 412 transitions. [2020-12-23 07:09:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-12-23 07:09:43,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:43,111 INFO L422 BasicCegarLoop]: trace histogram [113, 60, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:43,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:43,311 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash -420838527, now seen corresponding path program 59 times [2020-12-23 07:09:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:43,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989371566] [2020-12-23 07:09:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 6405 proven. 3660 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2020-12-23 07:09:45,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989371566] [2020-12-23 07:09:45,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049835189] [2020-12-23 07:09:45,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:46,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2020-12-23 07:09:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:09:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 9190 proven. 2421 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-12-23 07:09:50,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:50,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 39] total 100 [2020-12-23 07:09:50,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422888481] [2020-12-23 07:09:50,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-12-23 07:09:50,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-12-23 07:09:50,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 07:09:50,182 INFO L87 Difference]: Start difference. First operand 339 states and 412 transitions. Second operand 100 states. [2020-12-23 07:09:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:50,979 INFO L93 Difference]: Finished difference Result 574 states and 729 transitions. [2020-12-23 07:09:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-23 07:09:50,980 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 338 [2020-12-23 07:09:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:50,982 INFO L225 Difference]: With dead ends: 574 [2020-12-23 07:09:50,982 INFO L226 Difference]: Without dead ends: 357 [2020-12-23 07:09:50,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 07:09:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-23 07:09:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2020-12-23 07:09:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-23 07:09:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 434 transitions. [2020-12-23 07:09:50,988 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 434 transitions. Word has length 338 [2020-12-23 07:09:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:50,989 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 434 transitions. [2020-12-23 07:09:50,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-12-23 07:09:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 434 transitions. [2020-12-23 07:09:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-12-23 07:09:50,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:50,990 INFO L422 BasicCegarLoop]: trace histogram [118, 61, 57, 57, 37, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:51,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-12-23 07:09:51,205 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 349204808, now seen corresponding path program 60 times [2020-12-23 07:09:51,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:51,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797260079] [2020-12-23 07:09:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 7006 proven. 3782 refuted. 0 times theorem prover too weak. 6328 trivial. 0 not checked. [2020-12-23 07:09:53,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797260079] [2020-12-23 07:09:53,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634153834] [2020-12-23 07:09:53,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:54,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2020-12-23 07:09:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:54,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:09:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 5514 proven. 800 refuted. 0 times theorem prover too weak. 10802 trivial. 0 not checked. [2020-12-23 07:09:56,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:56,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 23] total 85 [2020-12-23 07:09:56,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409425015] [2020-12-23 07:09:56,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 07:09:56,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 07:09:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:09:56,321 INFO L87 Difference]: Start difference. First operand 357 states and 434 transitions. Second operand 85 states. [2020-12-23 07:09:57,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:57,016 INFO L93 Difference]: Finished difference Result 598 states and 758 transitions. [2020-12-23 07:09:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 07:09:57,016 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 356 [2020-12-23 07:09:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:57,019 INFO L225 Difference]: With dead ends: 598 [2020-12-23 07:09:57,019 INFO L226 Difference]: Without dead ends: 365 [2020-12-23 07:09:57,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:09:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-12-23 07:09:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 363. [2020-12-23 07:09:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-23 07:09:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 442 transitions. [2020-12-23 07:09:57,028 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 442 transitions. Word has length 356 [2020-12-23 07:09:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:57,028 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 442 transitions. [2020-12-23 07:09:57,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 07:09:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 442 transitions. [2020-12-23 07:09:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-12-23 07:09:57,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:57,030 INFO L422 BasicCegarLoop]: trace histogram [120, 62, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:57,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:57,244 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1494952590, now seen corresponding path program 61 times [2020-12-23 07:09:57,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:57,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164571690] [2020-12-23 07:09:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2020-12-23 07:09:59,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164571690] [2020-12-23 07:09:59,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044493628] [2020-12-23 07:09:59,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:10:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2020-12-23 07:10:00,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:00,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 07:10:00,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785294580] [2020-12-23 07:10:00,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 07:10:00,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 07:10:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:10:00,523 INFO L87 Difference]: Start difference. First operand 363 states and 442 transitions. Second operand 66 states. [2020-12-23 07:10:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:00,830 INFO L93 Difference]: Finished difference Result 602 states and 761 transitions. [2020-12-23 07:10:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:10:00,831 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 362 [2020-12-23 07:10:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:00,833 INFO L225 Difference]: With dead ends: 602 [2020-12-23 07:10:00,833 INFO L226 Difference]: Without dead ends: 365 [2020-12-23 07:10:00,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:10:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-12-23 07:10:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-12-23 07:10:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-12-23 07:10:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 444 transitions. [2020-12-23 07:10:00,841 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 444 transitions. Word has length 362 [2020-12-23 07:10:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:00,842 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 444 transitions. [2020-12-23 07:10:00,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 07:10:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 444 transitions. [2020-12-23 07:10:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-12-23 07:10:00,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:00,844 INFO L422 BasicCegarLoop]: trace histogram [121, 63, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:01,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 07:10:01,056 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2018944235, now seen corresponding path program 62 times [2020-12-23 07:10:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:01,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563356045] [2020-12-23 07:10:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2020-12-23 07:10:03,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563356045] [2020-12-23 07:10:03,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434761234] [2020-12-23 07:10:03,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:04,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:04,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 07:10:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2020-12-23 07:10:04,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:04,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 07:10:04,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878998288] [2020-12-23 07:10:04,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 07:10:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 07:10:04,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:10:04,515 INFO L87 Difference]: Start difference. First operand 365 states and 444 transitions. Second operand 67 states. [2020-12-23 07:10:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:04,824 INFO L93 Difference]: Finished difference Result 604 states and 763 transitions. [2020-12-23 07:10:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 07:10:04,824 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 364 [2020-12-23 07:10:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:04,827 INFO L225 Difference]: With dead ends: 604 [2020-12-23 07:10:04,827 INFO L226 Difference]: Without dead ends: 367 [2020-12-23 07:10:04,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:10:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-23 07:10:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2020-12-23 07:10:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-12-23 07:10:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 446 transitions. [2020-12-23 07:10:04,835 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 446 transitions. Word has length 364 [2020-12-23 07:10:04,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:04,836 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 446 transitions. [2020-12-23 07:10:04,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 07:10:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 446 transitions. [2020-12-23 07:10:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-12-23 07:10:04,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:04,838 INFO L422 BasicCegarLoop]: trace histogram [122, 64, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:05,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:05,054 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:05,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1231225848, now seen corresponding path program 63 times [2020-12-23 07:10:05,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:05,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499998408] [2020-12-23 07:10:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 7475 proven. 4160 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2020-12-23 07:10:08,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499998408] [2020-12-23 07:10:08,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467052602] [2020-12-23 07:10:08,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:08,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2020-12-23 07:10:08,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:10:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 5912 proven. 882 refuted. 0 times theorem prover too weak. 11396 trivial. 0 not checked. [2020-12-23 07:10:10,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:10,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 24] total 89 [2020-12-23 07:10:10,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906609982] [2020-12-23 07:10:10,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-23 07:10:10,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-23 07:10:10,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 07:10:10,838 INFO L87 Difference]: Start difference. First operand 367 states and 446 transitions. Second operand 89 states. [2020-12-23 07:10:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:11,517 INFO L93 Difference]: Finished difference Result 612 states and 776 transitions. [2020-12-23 07:10:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-23 07:10:11,518 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 366 [2020-12-23 07:10:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:11,519 INFO L225 Difference]: With dead ends: 612 [2020-12-23 07:10:11,519 INFO L226 Difference]: Without dead ends: 375 [2020-12-23 07:10:11,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 07:10:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-23 07:10:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2020-12-23 07:10:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-12-23 07:10:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 454 transitions. [2020-12-23 07:10:11,527 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 454 transitions. Word has length 366 [2020-12-23 07:10:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:11,528 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 454 transitions. [2020-12-23 07:10:11,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-23 07:10:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 454 transitions. [2020-12-23 07:10:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2020-12-23 07:10:11,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:11,530 INFO L422 BasicCegarLoop]: trace histogram [124, 65, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:11,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 07:10:11,744 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:11,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:11,745 INFO L82 PathProgramCache]: Analyzing trace with hash 758198370, now seen corresponding path program 64 times [2020-12-23 07:10:11,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:11,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001692829] [2020-12-23 07:10:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2020-12-23 07:10:14,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001692829] [2020-12-23 07:10:14,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490709544] [2020-12-23 07:10:14,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:14,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:14,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:14,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:10:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2020-12-23 07:10:15,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:15,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 07:10:15,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385961216] [2020-12-23 07:10:15,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:10:15,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:10:15,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:10:15,301 INFO L87 Difference]: Start difference. First operand 373 states and 454 transitions. Second operand 69 states. [2020-12-23 07:10:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:15,659 INFO L93 Difference]: Finished difference Result 616 states and 779 transitions. [2020-12-23 07:10:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 07:10:15,660 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 372 [2020-12-23 07:10:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:15,662 INFO L225 Difference]: With dead ends: 616 [2020-12-23 07:10:15,662 INFO L226 Difference]: Without dead ends: 375 [2020-12-23 07:10:15,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:10:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-23 07:10:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2020-12-23 07:10:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-12-23 07:10:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 456 transitions. [2020-12-23 07:10:15,669 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 456 transitions. Word has length 372 [2020-12-23 07:10:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:15,669 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 456 transitions. [2020-12-23 07:10:15,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:10:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 456 transitions. [2020-12-23 07:10:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-12-23 07:10:15,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:15,670 INFO L422 BasicCegarLoop]: trace histogram [125, 66, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:15,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 07:10:15,872 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2022619579, now seen corresponding path program 65 times [2020-12-23 07:10:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:15,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120710858] [2020-12-23 07:10:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 7839 proven. 4422 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2020-12-23 07:10:18,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120710858] [2020-12-23 07:10:18,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583340691] [2020-12-23 07:10:18,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:19,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2020-12-23 07:10:19,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:10:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 11250 proven. 3009 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2020-12-23 07:10:24,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:24,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 43] total 110 [2020-12-23 07:10:24,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748339119] [2020-12-23 07:10:24,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-12-23 07:10:24,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:24,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-12-23 07:10:24,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 07:10:24,240 INFO L87 Difference]: Start difference. First operand 375 states and 456 transitions. Second operand 110 states. [2020-12-23 07:10:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:25,247 INFO L93 Difference]: Finished difference Result 634 states and 805 transitions. [2020-12-23 07:10:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-12-23 07:10:25,248 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 374 [2020-12-23 07:10:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:25,250 INFO L225 Difference]: With dead ends: 634 [2020-12-23 07:10:25,250 INFO L226 Difference]: Without dead ends: 393 [2020-12-23 07:10:25,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 07:10:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-23 07:10:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2020-12-23 07:10:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-12-23 07:10:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 478 transitions. [2020-12-23 07:10:25,257 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 478 transitions. Word has length 374 [2020-12-23 07:10:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:25,257 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 478 transitions. [2020-12-23 07:10:25,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-12-23 07:10:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 478 transitions. [2020-12-23 07:10:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-12-23 07:10:25,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:25,260 INFO L422 BasicCegarLoop]: trace histogram [130, 67, 63, 63, 41, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:25,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 07:10:25,474 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:25,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1124028044, now seen corresponding path program 66 times [2020-12-23 07:10:25,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:25,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629303051] [2020-12-23 07:10:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 8500 proven. 4556 refuted. 0 times theorem prover too weak. 7750 trivial. 0 not checked. [2020-12-23 07:10:28,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629303051] [2020-12-23 07:10:28,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217505408] [2020-12-23 07:10:28,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:28,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2020-12-23 07:10:28,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:10:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 6682 proven. 968 refuted. 0 times theorem prover too weak. 13156 trivial. 0 not checked. [2020-12-23 07:10:31,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:31,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 25] total 93 [2020-12-23 07:10:31,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899306388] [2020-12-23 07:10:31,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-23 07:10:31,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:31,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-23 07:10:31,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 07:10:31,696 INFO L87 Difference]: Start difference. First operand 393 states and 478 transitions. Second operand 93 states. [2020-12-23 07:10:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:32,388 INFO L93 Difference]: Finished difference Result 658 states and 834 transitions. [2020-12-23 07:10:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-23 07:10:32,389 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 392 [2020-12-23 07:10:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:32,391 INFO L225 Difference]: With dead ends: 658 [2020-12-23 07:10:32,391 INFO L226 Difference]: Without dead ends: 401 [2020-12-23 07:10:32,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 07:10:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-12-23 07:10:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2020-12-23 07:10:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-23 07:10:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 486 transitions. [2020-12-23 07:10:32,400 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 486 transitions. Word has length 392 [2020-12-23 07:10:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:32,400 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 486 transitions. [2020-12-23 07:10:32,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-23 07:10:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 486 transitions. [2020-12-23 07:10:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-12-23 07:10:32,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:32,403 INFO L422 BasicCegarLoop]: trace histogram [132, 68, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:32,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:32,611 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash 153172790, now seen corresponding path program 67 times [2020-12-23 07:10:32,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:32,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836356884] [2020-12-23 07:10:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2020-12-23 07:10:35,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836356884] [2020-12-23 07:10:35,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863560793] [2020-12-23 07:10:35,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:36,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:10:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2020-12-23 07:10:36,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:36,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 07:10:36,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907960076] [2020-12-23 07:10:36,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 07:10:36,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:36,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 07:10:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:36,563 INFO L87 Difference]: Start difference. First operand 399 states and 486 transitions. Second operand 72 states. [2020-12-23 07:10:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:36,943 INFO L93 Difference]: Finished difference Result 662 states and 837 transitions. [2020-12-23 07:10:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 07:10:36,944 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 398 [2020-12-23 07:10:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:36,947 INFO L225 Difference]: With dead ends: 662 [2020-12-23 07:10:36,947 INFO L226 Difference]: Without dead ends: 401 [2020-12-23 07:10:36,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-12-23 07:10:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2020-12-23 07:10:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-12-23 07:10:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 488 transitions. [2020-12-23 07:10:36,955 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 488 transitions. Word has length 398 [2020-12-23 07:10:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:36,955 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 488 transitions. [2020-12-23 07:10:36,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 07:10:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 488 transitions. [2020-12-23 07:10:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-12-23 07:10:36,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:36,958 INFO L422 BasicCegarLoop]: trace histogram [133, 69, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:37,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:37,173 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1935479975, now seen corresponding path program 68 times [2020-12-23 07:10:37,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:37,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434856329] [2020-12-23 07:10:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2020-12-23 07:10:40,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434856329] [2020-12-23 07:10:40,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044289523] [2020-12-23 07:10:40,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:40,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:40,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:10:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2020-12-23 07:10:41,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:41,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 07:10:41,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833732658] [2020-12-23 07:10:41,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 07:10:41,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:41,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 07:10:41,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:41,260 INFO L87 Difference]: Start difference. First operand 401 states and 488 transitions. Second operand 73 states. [2020-12-23 07:10:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:41,663 INFO L93 Difference]: Finished difference Result 664 states and 839 transitions. [2020-12-23 07:10:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 07:10:41,664 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 400 [2020-12-23 07:10:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:41,666 INFO L225 Difference]: With dead ends: 664 [2020-12-23 07:10:41,666 INFO L226 Difference]: Without dead ends: 403 [2020-12-23 07:10:41,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-23 07:10:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2020-12-23 07:10:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-23 07:10:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 490 transitions. [2020-12-23 07:10:41,682 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 490 transitions. Word has length 400 [2020-12-23 07:10:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:41,683 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 490 transitions. [2020-12-23 07:10:41,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 07:10:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 490 transitions. [2020-12-23 07:10:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-12-23 07:10:41,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:41,684 INFO L422 BasicCegarLoop]: trace histogram [134, 70, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:41,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:41,885 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 913907388, now seen corresponding path program 69 times [2020-12-23 07:10:41,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:41,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263445321] [2020-12-23 07:10:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 9017 proven. 4970 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2020-12-23 07:10:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263445321] [2020-12-23 07:10:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837108944] [2020-12-23 07:10:45,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:45,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2020-12-23 07:10:45,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:45,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:10:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 7120 proven. 1058 refuted. 0 times theorem prover too weak. 13810 trivial. 0 not checked. [2020-12-23 07:10:48,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:48,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 26] total 97 [2020-12-23 07:10:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802571963] [2020-12-23 07:10:48,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-23 07:10:48,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-23 07:10:48,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 07:10:48,694 INFO L87 Difference]: Start difference. First operand 403 states and 490 transitions. Second operand 97 states. [2020-12-23 07:10:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:49,662 INFO L93 Difference]: Finished difference Result 672 states and 852 transitions. [2020-12-23 07:10:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-12-23 07:10:49,662 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 402 [2020-12-23 07:10:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:49,664 INFO L225 Difference]: With dead ends: 672 [2020-12-23 07:10:49,664 INFO L226 Difference]: Without dead ends: 411 [2020-12-23 07:10:49,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 07:10:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-23 07:10:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2020-12-23 07:10:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-12-23 07:10:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 498 transitions. [2020-12-23 07:10:49,673 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 498 transitions. Word has length 402 [2020-12-23 07:10:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:49,674 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 498 transitions. [2020-12-23 07:10:49,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-23 07:10:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 498 transitions. [2020-12-23 07:10:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-12-23 07:10:49,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:49,676 INFO L422 BasicCegarLoop]: trace histogram [136, 71, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:49,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-12-23 07:10:49,877 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:49,878 INFO L82 PathProgramCache]: Analyzing trace with hash 178189222, now seen corresponding path program 70 times [2020-12-23 07:10:49,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:49,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032597697] [2020-12-23 07:10:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2020-12-23 07:10:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032597697] [2020-12-23 07:10:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603156896] [2020-12-23 07:10:53,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:53,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:53,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 07:10:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2020-12-23 07:10:54,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:54,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 07:10:54,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788161810] [2020-12-23 07:10:54,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 07:10:54,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 07:10:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:54,158 INFO L87 Difference]: Start difference. First operand 409 states and 498 transitions. Second operand 75 states. [2020-12-23 07:10:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:54,568 INFO L93 Difference]: Finished difference Result 676 states and 855 transitions. [2020-12-23 07:10:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 07:10:54,568 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 408 [2020-12-23 07:10:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:54,571 INFO L225 Difference]: With dead ends: 676 [2020-12-23 07:10:54,571 INFO L226 Difference]: Without dead ends: 411 [2020-12-23 07:10:54,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-23 07:10:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2020-12-23 07:10:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-23 07:10:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 500 transitions. [2020-12-23 07:10:54,580 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 500 transitions. Word has length 408 [2020-12-23 07:10:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:54,581 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 500 transitions. [2020-12-23 07:10:54,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 07:10:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 500 transitions. [2020-12-23 07:10:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-12-23 07:10:54,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:54,583 INFO L422 BasicCegarLoop]: trace histogram [137, 72, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:54,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:54,797 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1997083657, now seen corresponding path program 71 times [2020-12-23 07:10:54,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:54,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130634947] [2020-12-23 07:10:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 9417 proven. 5256 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2020-12-23 07:10:58,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130634947] [2020-12-23 07:10:58,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419778891] [2020-12-23 07:10:58,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:58,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2020-12-23 07:10:58,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:10:58,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 13518 proven. 3661 refuted. 0 times theorem prover too weak. 5750 trivial. 0 not checked. [2020-12-23 07:11:04,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:04,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 47] total 120 [2020-12-23 07:11:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203551609] [2020-12-23 07:11:04,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-12-23 07:11:04,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:04,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-12-23 07:11:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2020-12-23 07:11:04,976 INFO L87 Difference]: Start difference. First operand 411 states and 500 transitions. Second operand 120 states. [2020-12-23 07:11:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:06,226 INFO L93 Difference]: Finished difference Result 694 states and 881 transitions. [2020-12-23 07:11:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-23 07:11:06,227 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 410 [2020-12-23 07:11:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:06,230 INFO L225 Difference]: With dead ends: 694 [2020-12-23 07:11:06,230 INFO L226 Difference]: Without dead ends: 429 [2020-12-23 07:11:06,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2020-12-23 07:11:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-12-23 07:11:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-12-23 07:11:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-23 07:11:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 522 transitions. [2020-12-23 07:11:06,237 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 522 transitions. Word has length 410 [2020-12-23 07:11:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:06,237 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 522 transitions. [2020-12-23 07:11:06,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-12-23 07:11:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 522 transitions. [2020-12-23 07:11:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-12-23 07:11:06,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:06,239 INFO L422 BasicCegarLoop]: trace histogram [142, 73, 69, 69, 45, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:06,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:06,440 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1001256656, now seen corresponding path program 72 times [2020-12-23 07:11:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:06,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395271250] [2020-12-23 07:11:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 10138 proven. 5402 refuted. 0 times theorem prover too weak. 9316 trivial. 0 not checked. [2020-12-23 07:11:10,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395271250] [2020-12-23 07:11:10,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001887548] [2020-12-23 07:11:10,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:10,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2020-12-23 07:11:10,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:10,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:11:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 7962 proven. 1152 refuted. 0 times theorem prover too weak. 15742 trivial. 0 not checked. [2020-12-23 07:11:13,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:13,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 27] total 101 [2020-12-23 07:11:13,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466228337] [2020-12-23 07:11:13,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-12-23 07:11:13,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-12-23 07:11:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 07:11:13,938 INFO L87 Difference]: Start difference. First operand 429 states and 522 transitions. Second operand 101 states. [2020-12-23 07:11:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:14,758 INFO L93 Difference]: Finished difference Result 718 states and 910 transitions. [2020-12-23 07:11:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-12-23 07:11:14,759 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 428 [2020-12-23 07:11:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:14,760 INFO L225 Difference]: With dead ends: 718 [2020-12-23 07:11:14,760 INFO L226 Difference]: Without dead ends: 437 [2020-12-23 07:11:14,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 07:11:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-12-23 07:11:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 435. [2020-12-23 07:11:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-23 07:11:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 530 transitions. [2020-12-23 07:11:14,767 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 530 transitions. Word has length 428 [2020-12-23 07:11:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:14,767 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 530 transitions. [2020-12-23 07:11:14,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-12-23 07:11:14,767 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 530 transitions. [2020-12-23 07:11:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-12-23 07:11:14,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:14,769 INFO L422 BasicCegarLoop]: trace histogram [144, 74, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:14,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:14,970 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash -313742342, now seen corresponding path program 73 times [2020-12-23 07:11:14,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:14,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893767668] [2020-12-23 07:11:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2020-12-23 07:11:18,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893767668] [2020-12-23 07:11:18,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326937208] [2020-12-23 07:11:18,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 07:11:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2020-12-23 07:11:19,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:19,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 07:11:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596778582] [2020-12-23 07:11:19,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 07:11:19,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 07:11:19,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:19,576 INFO L87 Difference]: Start difference. First operand 435 states and 530 transitions. Second operand 78 states. [2020-12-23 07:11:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:20,001 INFO L93 Difference]: Finished difference Result 722 states and 913 transitions. [2020-12-23 07:11:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 07:11:20,002 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 434 [2020-12-23 07:11:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:20,004 INFO L225 Difference]: With dead ends: 722 [2020-12-23 07:11:20,004 INFO L226 Difference]: Without dead ends: 437 [2020-12-23 07:11:20,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:20,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-12-23 07:11:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2020-12-23 07:11:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-12-23 07:11:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 532 transitions. [2020-12-23 07:11:20,011 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 532 transitions. Word has length 434 [2020-12-23 07:11:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:20,011 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 532 transitions. [2020-12-23 07:11:20,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 07:11:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 532 transitions. [2020-12-23 07:11:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-12-23 07:11:20,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:20,013 INFO L422 BasicCegarLoop]: trace histogram [145, 75, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:20,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-23 07:11:20,214 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:20,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1784133987, now seen corresponding path program 74 times [2020-12-23 07:11:20,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:20,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779704034] [2020-12-23 07:11:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2020-12-23 07:11:24,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779704034] [2020-12-23 07:11:24,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905137118] [2020-12-23 07:11:24,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:24,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 07:11:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2020-12-23 07:11:24,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:24,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 07:11:24,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820791120] [2020-12-23 07:11:24,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 07:11:24,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 07:11:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:11:24,982 INFO L87 Difference]: Start difference. First operand 437 states and 532 transitions. Second operand 79 states. [2020-12-23 07:11:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:25,397 INFO L93 Difference]: Finished difference Result 724 states and 915 transitions. [2020-12-23 07:11:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 07:11:25,398 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 436 [2020-12-23 07:11:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:25,400 INFO L225 Difference]: With dead ends: 724 [2020-12-23 07:11:25,400 INFO L226 Difference]: Without dead ends: 439 [2020-12-23 07:11:25,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:11:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-12-23 07:11:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2020-12-23 07:11:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-23 07:11:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 534 transitions. [2020-12-23 07:11:25,408 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 534 transitions. Word has length 436 [2020-12-23 07:11:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:25,408 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 534 transitions. [2020-12-23 07:11:25,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 07:11:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 534 transitions. [2020-12-23 07:11:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-12-23 07:11:25,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:25,411 INFO L422 BasicCegarLoop]: trace histogram [146, 76, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:25,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:25,612 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:25,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1786264448, now seen corresponding path program 75 times [2020-12-23 07:11:25,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:25,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813522705] [2020-12-23 07:11:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 10703 proven. 5852 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2020-12-23 07:11:29,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813522705] [2020-12-23 07:11:29,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813638222] [2020-12-23 07:11:29,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:30,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 07:11:30,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:11:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 8440 proven. 1250 refuted. 0 times theorem prover too weak. 16456 trivial. 0 not checked. [2020-12-23 07:11:33,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:33,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 28] total 105 [2020-12-23 07:11:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439175778] [2020-12-23 07:11:33,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-12-23 07:11:33,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-12-23 07:11:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 07:11:33,699 INFO L87 Difference]: Start difference. First operand 439 states and 534 transitions. Second operand 105 states. [2020-12-23 07:11:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:34,609 INFO L93 Difference]: Finished difference Result 732 states and 928 transitions. [2020-12-23 07:11:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-23 07:11:34,609 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 438 [2020-12-23 07:11:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:34,611 INFO L225 Difference]: With dead ends: 732 [2020-12-23 07:11:34,611 INFO L226 Difference]: Without dead ends: 447 [2020-12-23 07:11:34,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 07:11:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-12-23 07:11:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 445. [2020-12-23 07:11:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-12-23 07:11:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 542 transitions. [2020-12-23 07:11:34,618 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 542 transitions. Word has length 438 [2020-12-23 07:11:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:34,618 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 542 transitions. [2020-12-23 07:11:34,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-12-23 07:11:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 542 transitions. [2020-12-23 07:11:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-12-23 07:11:34,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:34,620 INFO L422 BasicCegarLoop]: trace histogram [148, 77, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:34,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:34,822 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1042579946, now seen corresponding path program 76 times [2020-12-23 07:11:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:34,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833826885] [2020-12-23 07:11:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2020-12-23 07:11:39,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833826885] [2020-12-23 07:11:39,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893566607] [2020-12-23 07:11:39,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:39,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:39,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 07:11:39,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2020-12-23 07:11:39,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:39,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 07:11:39,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084912859] [2020-12-23 07:11:39,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 07:11:39,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 07:11:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:39,848 INFO L87 Difference]: Start difference. First operand 445 states and 542 transitions. Second operand 81 states. [2020-12-23 07:11:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:40,262 INFO L93 Difference]: Finished difference Result 736 states and 931 transitions. [2020-12-23 07:11:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:11:40,263 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 444 [2020-12-23 07:11:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:40,265 INFO L225 Difference]: With dead ends: 736 [2020-12-23 07:11:40,266 INFO L226 Difference]: Without dead ends: 447 [2020-12-23 07:11:40,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-12-23 07:11:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-12-23 07:11:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-12-23 07:11:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 544 transitions. [2020-12-23 07:11:40,273 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 544 transitions. Word has length 444 [2020-12-23 07:11:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:40,273 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 544 transitions. [2020-12-23 07:11:40,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 07:11:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 544 transitions. [2020-12-23 07:11:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-12-23 07:11:40,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:40,275 INFO L422 BasicCegarLoop]: trace histogram [149, 78, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:40,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 07:11:40,476 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash -773493555, now seen corresponding path program 77 times [2020-12-23 07:11:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:40,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226876937] [2020-12-23 07:11:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27171 backedges. 11139 proven. 6162 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2020-12-23 07:11:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226876937] [2020-12-23 07:11:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670281708] [2020-12-23 07:11:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:45,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 99 check-sat command(s) [2020-12-23 07:11:45,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:45,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 07:11:45,148 INFO L286 TraceCheckSpWp]: Computing forward predicates...