/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/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:00:37,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:00:37,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:00:37,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:00:37,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:00:37,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:00:37,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:00:37,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:00:37,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:00:37,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:00:37,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:00:37,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:00:37,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:00:37,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:00:37,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:00:37,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:00:37,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:00:37,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:00:37,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:00:37,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:00:37,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:00:37,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:00:37,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:00:37,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:00:37,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:00:37,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:00:37,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:00:37,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:00:37,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:00:37,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:00:37,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:00:37,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:00:37,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:00:37,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:00:37,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:00:37,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:00:37,253 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 07:00:37,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:00:37,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:00:37,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:00:37,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:00:37,284 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:00:37,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:00:37,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:00:37,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:00:37,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:00:37,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:00:37,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:00:37,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:00:37,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:00:37,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:00:37,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:00:37,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:00:37,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:00:37,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:00:37,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:00:37,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:00:37,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:00:37,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:00:37,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:00:37,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:00:37,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:00:37,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:00:37,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:00:37,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:00:37,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:00:37,729 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:00:37,730 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:00:37,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c [2020-12-23 07:00:37,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07655e879/9f7c6306d1cf40e1afe7bc0bd5690f27/FLAG7a46e3ab4 [2020-12-23 07:00:38,507 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:00:38,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c [2020-12-23 07:00:38,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07655e879/9f7c6306d1cf40e1afe7bc0bd5690f27/FLAG7a46e3ab4 [2020-12-23 07:00:38,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07655e879/9f7c6306d1cf40e1afe7bc0bd5690f27 [2020-12-23 07:00:38,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:00:38,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:00:38,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:00:38,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:00:38,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:00:38,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:00:38" (1/1) ... [2020-12-23 07:00:38,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28822b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:38, skipping insertion in model container [2020-12-23 07:00:38,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:00:38" (1/1) ... [2020-12-23 07:00:38,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:00:38,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:00:39,073 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/Mono1_1-1.c[313,326] [2020-12-23 07:00:39,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:00:39,110 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:00:39,128 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/Mono1_1-1.c[313,326] [2020-12-23 07:00:39,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:00:39,157 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:00:39,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39 WrapperNode [2020-12-23 07:00:39,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:00:39,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:00:39,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:00:39,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:00:39,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:00:39,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:00:39,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:00:39,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:00:39,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (1/1) ... [2020-12-23 07:00:39,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:00:39,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:00:39,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:00:39,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:00:39,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (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 07:00:39,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:00:39,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:00:39,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:00:39,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:00:39,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:00:39,645 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:00:39,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:00:39 BoogieIcfgContainer [2020-12-23 07:00:39,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:00:39,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:00:39,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:00:39,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:00:39,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:00:38" (1/3) ... [2020-12-23 07:00:39,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d1f4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:00:39, skipping insertion in model container [2020-12-23 07:00:39,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:00:39" (2/3) ... [2020-12-23 07:00:39,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d1f4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:00:39, skipping insertion in model container [2020-12-23 07:00:39,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:00:39" (3/3) ... [2020-12-23 07:00:39,658 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-12-23 07:00:39,666 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:00:39,672 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:00:39,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:00:39,791 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:00:39,791 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:00:39,791 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:00:39,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:00:39,795 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:00:39,795 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:00:39,795 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:00:39,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:00:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-23 07:00:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:00:39,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:39,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:00:39,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-23 07:00:39,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:39,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236117991] [2020-12-23 07:00:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:40,017 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 07:00:40,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236117991] [2020-12-23 07:00:40,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:00:40,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:00:40,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390738525] [2020-12-23 07:00:40,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:00:40,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:40,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:00:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:00:40,058 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-23 07:00:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:40,084 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-23 07:00:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:00:40,086 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 07:00:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:40,107 INFO L225 Difference]: With dead ends: 18 [2020-12-23 07:00:40,107 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 07:00:40,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:00:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 07:00:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 07:00:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 07:00:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-23 07:00:40,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-23 07:00:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:40,165 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-23 07:00:40,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:00:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-23 07:00:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:00:40,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:40,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:00:40,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:00:40,169 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-23 07:00:40,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:40,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829345494] [2020-12-23 07:00:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:40,356 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 07:00:40,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829345494] [2020-12-23 07:00:40,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:00:40,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:00:40,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421560209] [2020-12-23 07:00:40,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:00:40,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:40,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:00:40,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:00:40,364 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-23 07:00:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:40,444 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-23 07:00:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:00:40,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 07:00:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:40,450 INFO L225 Difference]: With dead ends: 16 [2020-12-23 07:00:40,450 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 07:00:40,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 07:00:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 07:00:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 07:00:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 07:00:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 07:00:40,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-23 07:00:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:40,455 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 07:00:40,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:00:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 07:00:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:00:40,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:40,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:40,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:00:40,461 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-23 07:00:40,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:40,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917727278] [2020-12-23 07:00:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:40,590 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 07:00:40,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917727278] [2020-12-23 07:00:40,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738263844] [2020-12-23 07:00:40,592 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 07:00:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:40,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:00:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:40,730 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 07:00:40,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:40,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:00:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911809958] [2020-12-23 07:00:40,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:00:40,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:00:40,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:00:40,735 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-23 07:00:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:40,786 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 07:00:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:00:40,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 07:00:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:40,789 INFO L225 Difference]: With dead ends: 18 [2020-12-23 07:00:40,789 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:00:40,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:00:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:00:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:00:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:00:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 07:00:40,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-23 07:00:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:40,794 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 07:00:40,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:00:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 07:00:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:00:40,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:40,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:41,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 07:00:41,010 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-23 07:00:41,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:41,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553588340] [2020-12-23 07:00:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:41,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553588340] [2020-12-23 07:00:41,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681012682] [2020-12-23 07:00:41,165 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 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 07:00:41,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:41,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:00:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:41,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:41,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:00:41,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839248352] [2020-12-23 07:00:41,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:00:41,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:00:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:00:41,252 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-23 07:00:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:41,289 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-23 07:00:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:00:41,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 07:00:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:41,291 INFO L225 Difference]: With dead ends: 20 [2020-12-23 07:00:41,291 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 07:00:41,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:00:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 07:00:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 07:00:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:00:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 07:00:41,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-23 07:00:41,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:41,296 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 07:00:41,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:00:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 07:00:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:00:41,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:41,298 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:41,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:41,513 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2020-12-23 07:00:41,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:41,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960050388] [2020-12-23 07:00:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:41,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960050388] [2020-12-23 07:00:41,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200068780] [2020-12-23 07:00:41,638 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 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 07:00:41,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:00:41,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:00:41,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:41,716 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 07:00:41,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:41,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-23 07:00:41,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716598309] [2020-12-23 07:00:41,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:00:41,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:41,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:00:41,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:00:41,719 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-12-23 07:00:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:41,769 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-23 07:00:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:00:41,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 07:00:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:41,771 INFO L225 Difference]: With dead ends: 20 [2020-12-23 07:00:41,771 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:00:41,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:00:41,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:00:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-23 07:00:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:00:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 07:00:41,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-23 07:00:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:41,777 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 07:00:41,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:00:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 07:00:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:00:41,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:41,778 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:41,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:41,991 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:41,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 1 times [2020-12-23 07:00:41,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:41,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732827245] [2020-12-23 07:00:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:42,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732827245] [2020-12-23 07:00:42,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938757989] [2020-12-23 07:00:42,160 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 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 07:00:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:42,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:00:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:42,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:42,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:00:42,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187985028] [2020-12-23 07:00:42,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:00:42,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:00:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:00:42,347 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-23 07:00:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:42,430 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-23 07:00:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:00:42,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 07:00:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:42,441 INFO L225 Difference]: With dead ends: 24 [2020-12-23 07:00:42,441 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:00:42,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:00:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:00:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:00:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:00:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 07:00:42,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-23 07:00:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:42,454 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 07:00:42,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:00:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 07:00:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:00:42,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:42,455 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:42,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:42,670 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 2 times [2020-12-23 07:00:42,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:42,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634886158] [2020-12-23 07:00:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:42,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634886158] [2020-12-23 07:00:42,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422560627] [2020-12-23 07:00:42,847 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 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 07:00:42,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:42,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:00:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:42,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:42,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-23 07:00:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475161215] [2020-12-23 07:00:42,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:00:42,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:42,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:00:42,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:00:42,990 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-23 07:00:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:43,061 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-23 07:00:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:00:43,061 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 07:00:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:43,062 INFO L225 Difference]: With dead ends: 26 [2020-12-23 07:00:43,062 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:00:43,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:00:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:00:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 07:00:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:00:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-23 07:00:43,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-12-23 07:00:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:43,068 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-23 07:00:43,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:00:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-23 07:00:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:00:43,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:43,069 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:43,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 07:00:43,285 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 3 times [2020-12-23 07:00:43,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:43,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479524534] [2020-12-23 07:00:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:43,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479524534] [2020-12-23 07:00:43,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543815903] [2020-12-23 07:00:43,401 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 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 07:00:43,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:00:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:00:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:00:43,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:43,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-23 07:00:43,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866311700] [2020-12-23 07:00:43,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:00:43,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:00:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:00:43,522 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2020-12-23 07:00:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:43,679 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 07:00:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:00:43,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 07:00:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:43,681 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:00:43,681 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 07:00:43,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:00:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 07:00:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-23 07:00:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:00:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 07:00:43,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-12-23 07:00:43,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:43,688 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 07:00:43,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:00:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 07:00:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:00:43,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:43,690 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:43,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:43,904 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 4 times [2020-12-23 07:00:43,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:43,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398995010] [2020-12-23 07:00:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:44,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398995010] [2020-12-23 07:00:44,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768090821] [2020-12-23 07:00:44,081 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 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 07:00:44,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:00:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:00:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:44,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:44,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:00:44,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705745168] [2020-12-23 07:00:44,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:00:44,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:44,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:00:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:00:44,211 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-12-23 07:00:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:44,312 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 07:00:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:00:44,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 07:00:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:44,313 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:00:44,313 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:00:44,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:00:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:00:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 07:00:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:00:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 07:00:44,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-12-23 07:00:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:44,319 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 07:00:44,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:00:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 07:00:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:00:44,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:44,320 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:44,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:44,535 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 5 times [2020-12-23 07:00:44,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:44,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148018209] [2020-12-23 07:00:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:44,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148018209] [2020-12-23 07:00:44,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096035763] [2020-12-23 07:00:44,701 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 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 07:00:44,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 07:00:44,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:44,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:00:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:45,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:45,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 07:00:45,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209800136] [2020-12-23 07:00:45,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:00:45,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:45,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:00:45,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:00:45,023 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-12-23 07:00:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:45,150 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-23 07:00:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:00:45,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-23 07:00:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:45,152 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:00:45,152 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:00:45,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:00:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:00:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 07:00:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:00:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-23 07:00:45,158 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-12-23 07:00:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:45,158 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-23 07:00:45,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:00:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-23 07:00:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:00:45,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:45,159 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:45,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:00:45,366 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -215610733, now seen corresponding path program 6 times [2020-12-23 07:00:45,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:45,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174938014] [2020-12-23 07:00:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:45,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174938014] [2020-12-23 07:00:45,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790733020] [2020-12-23 07:00:45,534 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 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 07:00:45,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:00:45,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:00:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:45,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:45,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2020-12-23 07:00:45,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81106789] [2020-12-23 07:00:45,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:00:45,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:45,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:00:45,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:00:45,734 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 13 states. [2020-12-23 07:00:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:45,882 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 07:00:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:00:45,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-23 07:00:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:45,883 INFO L225 Difference]: With dead ends: 38 [2020-12-23 07:00:45,884 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:00:45,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:00:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:00:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 07:00:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:00:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-23 07:00:45,889 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-12-23 07:00:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:45,890 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-23 07:00:45,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:00:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-23 07:00:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:00:45,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:45,891 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:46,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:46,105 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1671352778, now seen corresponding path program 7 times [2020-12-23 07:00:46,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:46,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502447114] [2020-12-23 07:00:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:46,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502447114] [2020-12-23 07:00:46,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255119024] [2020-12-23 07:00:46,323 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 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 07:00:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:46,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:00:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:46,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:46,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:00:46,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463443271] [2020-12-23 07:00:46,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:00:46,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:00:46,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:00:46,475 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2020-12-23 07:00:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:46,641 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-23 07:00:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:00:46,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-23 07:00:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:46,642 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:00:46,642 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:00:46,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:00:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:00:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 07:00:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:00:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-23 07:00:46,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-12-23 07:00:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:46,649 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-23 07:00:46,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:00:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-23 07:00:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:00:46,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:46,650 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:46,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:46,864 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:46,865 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 8 times [2020-12-23 07:00:46,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:46,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413556024] [2020-12-23 07:00:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:47,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413556024] [2020-12-23 07:00:47,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125771382] [2020-12-23 07:00:47,073 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 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 07:00:47,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:47,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:47,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:00:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:47,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:47,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 16 [2020-12-23 07:00:47,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109515110] [2020-12-23 07:00:47,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:00:47,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:47,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:00:47,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:00:47,247 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 16 states. [2020-12-23 07:00:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:47,498 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-23 07:00:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:00:47,499 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-23 07:00:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:47,504 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:00:47,504 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:00:47,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:00:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:00:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:00:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:00:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 07:00:47,524 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-12-23 07:00:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:47,524 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 07:00:47,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:00:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 07:00:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:00:47,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:47,525 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:47,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:00:47,731 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 9 times [2020-12-23 07:00:47,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:47,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765358063] [2020-12-23 07:00:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:00:48,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765358063] [2020-12-23 07:00:48,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411120572] [2020-12-23 07:00:48,007 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 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 07:00:48,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:00:48,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:00:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-23 07:00:48,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:48,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-23 07:00:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303228942] [2020-12-23 07:00:48,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:00:48,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:00:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:00:48,357 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 17 states. [2020-12-23 07:00:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:48,784 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-12-23 07:00:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:00:48,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-23 07:00:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:48,785 INFO L225 Difference]: With dead ends: 47 [2020-12-23 07:00:48,786 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:00:48,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:00:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:00:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 07:00:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:00:48,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 07:00:48,798 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-12-23 07:00:48,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:48,798 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 07:00:48,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:00:48,798 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 07:00:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:00:48,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:48,802 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:49,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:00:49,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1350359876, now seen corresponding path program 10 times [2020-12-23 07:00:49,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:49,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528222470] [2020-12-23 07:00:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:00:49,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528222470] [2020-12-23 07:00:49,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824248452] [2020-12-23 07:00:49,274 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 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 07:00:49,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:00:49,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:49,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:00:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:00:49,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:49,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:00:49,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442520020] [2020-12-23 07:00:49,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:00:49,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:49,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:00:49,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:00:49,480 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-12-23 07:00:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:49,778 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-23 07:00:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:00:49,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-23 07:00:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:49,780 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:00:49,780 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:00:49,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:00:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:00:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 07:00:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 07:00:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-23 07:00:49,786 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-12-23 07:00:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:49,786 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-23 07:00:49,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:00:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-23 07:00:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:00:49,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:49,787 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:50,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:00:50,002 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 11 times [2020-12-23 07:00:50,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:50,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379813922] [2020-12-23 07:00:50,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:00:50,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379813922] [2020-12-23 07:00:50,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908436380] [2020-12-23 07:00:50,275 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 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 07:00:50,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 07:00:50,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:50,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:00:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:00:50,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:50,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:00:50,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047482627] [2020-12-23 07:00:50,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:00:50,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:00:50,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:00:50,853 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 17 states. [2020-12-23 07:00:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:51,171 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-23 07:00:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:00:51,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-12-23 07:00:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:51,173 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:00:51,173 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 07:00:51,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:00:51,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 07:00:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 07:00:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 07:00:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-23 07:00:51,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-12-23 07:00:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:51,182 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-23 07:00:51,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:00:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-23 07:00:51,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:00:51,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:51,183 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:51,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:51,389 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 12 times [2020-12-23 07:00:51,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:51,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990298231] [2020-12-23 07:00:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:00:51,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990298231] [2020-12-23 07:00:51,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217175502] [2020-12-23 07:00:51,681 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 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 07:00:51,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 07:00:51,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:51,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:00:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 07:00:52,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:52,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-12-23 07:00:52,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946719628] [2020-12-23 07:00:52,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:00:52,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:52,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:00:52,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:00:52,261 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2020-12-23 07:00:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:52,970 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-12-23 07:00:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:00:52,971 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-23 07:00:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:52,972 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:00:52,972 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 07:00:52,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:00:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 07:00:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 07:00:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:00:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 07:00:52,979 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2020-12-23 07:00:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:52,979 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 07:00:52,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:00:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 07:00:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:00:52,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:52,980 INFO L422 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:53,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:00:53,184 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 13 times [2020-12-23 07:00:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:53,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122163420] [2020-12-23 07:00:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:00:53,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122163420] [2020-12-23 07:00:53,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691497801] [2020-12-23 07:00:53,539 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 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 07:00:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:53,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:00:53,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:00:53,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:53,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:00:53,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260749117] [2020-12-23 07:00:53,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:00:53,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:53,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:00:53,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:00:53,771 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-12-23 07:00:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:54,170 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-23 07:00:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:00:54,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-23 07:00:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:54,171 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:00:54,171 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 07:00:54,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:00:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 07:00:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 07:00:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 07:00:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 07:00:54,177 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-12-23 07:00:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:54,177 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 07:00:54,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:00:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 07:00:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:00:54,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:54,179 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:54,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:00:54,389 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:54,390 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 14 times [2020-12-23 07:00:54,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:54,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678318052] [2020-12-23 07:00:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:00:54,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678318052] [2020-12-23 07:00:54,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482684619] [2020-12-23 07:00:54,766 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 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 07:00:54,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:54,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 07:00:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:55,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:55,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2020-12-23 07:00:55,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006865823] [2020-12-23 07:00:55,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:00:55,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:00:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:00:55,013 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-12-23 07:00:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:55,514 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-23 07:00:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:00:55,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-23 07:00:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:55,515 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:00:55,516 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 07:00:55,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:00:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 07:00:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 07:00:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 07:00:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-23 07:00:55,522 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-12-23 07:00:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:55,523 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-23 07:00:55,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:00:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-23 07:00:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:00:55,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:55,524 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:55,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:55,737 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 15 times [2020-12-23 07:00:55,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:55,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820270116] [2020-12-23 07:00:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:00:56,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820270116] [2020-12-23 07:00:56,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553280221] [2020-12-23 07:00:56,184 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 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 07:00:56,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:00:56,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:00:56,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 16 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-23 07:00:56,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:56,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2020-12-23 07:00:56,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183050312] [2020-12-23 07:00:56,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:00:56,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:00:56,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:00:56,730 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2020-12-23 07:00:58,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:58,236 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-12-23 07:00:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:00:58,237 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-23 07:00:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:58,238 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:00:58,238 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:00:58,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:00:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:00:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-12-23 07:00:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:00:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-23 07:00:58,245 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2020-12-23 07:00:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:58,246 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-23 07:00:58,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:00:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-23 07:00:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:00:58,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:58,248 INFO L422 BasicCegarLoop]: trace histogram [23, 18, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:58,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:58,463 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1008695328, now seen corresponding path program 16 times [2020-12-23 07:00:58,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:58,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461280676] [2020-12-23 07:00:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:00:58,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461280676] [2020-12-23 07:00:58,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165441003] [2020-12-23 07:00:58,902 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 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 07:00:58,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:00:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:00:58,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:00:59,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:59,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:00:59,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410024986] [2020-12-23 07:00:59,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:00:59,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:59,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:00:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:00:59,111 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 22 states. [2020-12-23 07:00:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:59,693 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-12-23 07:00:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:00:59,694 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-23 07:00:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:59,695 INFO L225 Difference]: With dead ends: 72 [2020-12-23 07:00:59,695 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:00:59,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:00:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:00:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 07:00:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 07:00:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-23 07:00:59,701 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-12-23 07:00:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:59,701 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-23 07:00:59,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:00:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-23 07:00:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:00:59,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:59,702 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:59,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:59,916 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 17 times [2020-12-23 07:00:59,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:59,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773780092] [2020-12-23 07:00:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:01:00,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773780092] [2020-12-23 07:01:00,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366081794] [2020-12-23 07:01:00,433 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 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 07:01:01,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-23 07:01:01,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:01,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 07:01:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:01:01,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:01,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 07:01:01,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659519041] [2020-12-23 07:01:01,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:01:01,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:01:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:01:01,990 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2020-12-23 07:01:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:02,633 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-12-23 07:01:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:01:02,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-23 07:01:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:02,637 INFO L225 Difference]: With dead ends: 74 [2020-12-23 07:01:02,637 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:01:02,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 21 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:01:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:01:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 07:01:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 07:01:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-23 07:01:02,643 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-12-23 07:01:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:02,643 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-23 07:01:02,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:01:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-23 07:01:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 07:01:02,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:02,644 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:02,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:01:02,850 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:02,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 18 times [2020-12-23 07:01:02,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:02,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981642912] [2020-12-23 07:01:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:01:03,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981642912] [2020-12-23 07:01:03,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343896133] [2020-12-23 07:01:03,322 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 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 07:01:04,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 07:01:04,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:01:04,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 337 proven. 176 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 07:01:05,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:05,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 37 [2020-12-23 07:01:05,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256855300] [2020-12-23 07:01:05,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:01:05,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:05,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:01:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:01:05,938 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 37 states. [2020-12-23 07:01:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:07,319 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-12-23 07:01:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:01:07,320 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2020-12-23 07:01:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:07,322 INFO L225 Difference]: With dead ends: 94 [2020-12-23 07:01:07,322 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 07:01:07,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:01:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 07:01:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-12-23 07:01:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 07:01:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-23 07:01:07,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2020-12-23 07:01:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:07,328 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-23 07:01:07,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:01:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-23 07:01:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 07:01:07,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:07,329 INFO L422 BasicCegarLoop]: trace histogram [27, 21, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:07,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:01:07,534 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:07,535 INFO L82 PathProgramCache]: Analyzing trace with hash 766560110, now seen corresponding path program 19 times [2020-12-23 07:01:07,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:07,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273184035] [2020-12-23 07:01:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:01:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273184035] [2020-12-23 07:01:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135845014] [2020-12-23 07:01:08,097 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 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 07:01:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:01:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:01:08,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:08,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:01:08,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338116931] [2020-12-23 07:01:08,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:01:08,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:08,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:01:08,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:01:08,319 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-12-23 07:01:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:09,038 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-12-23 07:01:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:01:09,039 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-12-23 07:01:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:09,039 INFO L225 Difference]: With dead ends: 82 [2020-12-23 07:01:09,040 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:01:09,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:01:09,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:01:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 07:01:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:01:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 07:01:09,046 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-12-23 07:01:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:09,046 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 07:01:09,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:01:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 07:01:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 07:01:09,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:09,047 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:09,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:09,261 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:09,262 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 20 times [2020-12-23 07:01:09,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:09,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798701540] [2020-12-23 07:01:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:01:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798701540] [2020-12-23 07:01:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035890961] [2020-12-23 07:01:09,852 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 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 07:01:09,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:01:09,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:01:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:10,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:10,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 32 [2020-12-23 07:01:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336917240] [2020-12-23 07:01:10,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:01:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:01:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:01:10,277 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2020-12-23 07:01:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:11,255 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-12-23 07:01:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:01:11,255 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-23 07:01:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:11,256 INFO L225 Difference]: With dead ends: 84 [2020-12-23 07:01:11,257 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 07:01:11,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:01:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 07:01:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 07:01:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 07:01:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-23 07:01:11,263 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-12-23 07:01:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:11,263 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-23 07:01:11,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:01:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-23 07:01:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 07:01:11,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:11,264 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:11,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:01:11,477 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:11,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 21 times [2020-12-23 07:01:11,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:11,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991430649] [2020-12-23 07:01:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:01:12,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991430649] [2020-12-23 07:01:12,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371330527] [2020-12-23 07:01:12,119 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 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 07:01:12,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 07:01:12,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:12,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:01:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 36 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-23 07:01:12,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:12,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-23 07:01:12,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956450197] [2020-12-23 07:01:12,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:01:12,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:12,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:01:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:01:12,756 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2020-12-23 07:01:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:15,178 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-23 07:01:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:01:15,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-23 07:01:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:15,180 INFO L225 Difference]: With dead ends: 90 [2020-12-23 07:01:15,180 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 07:01:15,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:01:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 07:01:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-12-23 07:01:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 07:01:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-23 07:01:15,187 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2020-12-23 07:01:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:15,187 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-23 07:01:15,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:01:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-23 07:01:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 07:01:15,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:15,188 INFO L422 BasicCegarLoop]: trace histogram [31, 24, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:15,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:15,402 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:15,403 INFO L82 PathProgramCache]: Analyzing trace with hash -373808516, now seen corresponding path program 22 times [2020-12-23 07:01:15,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:15,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191169917] [2020-12-23 07:01:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:01:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191169917] [2020-12-23 07:01:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234243384] [2020-12-23 07:01:16,129 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 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 07:01:16,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:16,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:16,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:01:16,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:01:16,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:16,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 07:01:16,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500861308] [2020-12-23 07:01:16,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:01:16,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:01:16,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:01:16,375 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2020-12-23 07:01:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:17,342 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-23 07:01:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:01:17,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-12-23 07:01:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:17,344 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:01:17,345 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 07:01:17,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:01:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 07:01:17,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 07:01:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 07:01:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-23 07:01:17,350 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-12-23 07:01:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:17,351 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-23 07:01:17,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:01:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-23 07:01:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 07:01:17,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:17,352 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:17,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:01:17,556 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 23 times [2020-12-23 07:01:17,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:17,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3300326] [2020-12-23 07:01:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:01:18,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3300326] [2020-12-23 07:01:18,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25970707] [2020-12-23 07:01:18,266 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 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 07:01:27,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-23 07:01:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:27,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:01:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 252 proven. 756 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:01:27,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:27,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 31 [2020-12-23 07:01:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774741448] [2020-12-23 07:01:27,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:01:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:01:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:01:27,999 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 31 states. [2020-12-23 07:01:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:29,154 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-23 07:01:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:01:29,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-12-23 07:01:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:29,155 INFO L225 Difference]: With dead ends: 94 [2020-12-23 07:01:29,155 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 07:01:29,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:01:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 07:01:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-23 07:01:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 07:01:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-23 07:01:29,162 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-23 07:01:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:29,162 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-23 07:01:29,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:01:29,162 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-23 07:01:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 07:01:29,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:29,163 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:29,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:01:29,368 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 24 times [2020-12-23 07:01:29,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:29,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975746601] [2020-12-23 07:01:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:01:30,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975746601] [2020-12-23 07:01:30,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697314988] [2020-12-23 07:01:30,167 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 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 07:01:31,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 07:01:31,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:31,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:01:31,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 49 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-23 07:01:32,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:32,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 07:01:32,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030271130] [2020-12-23 07:01:32,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:01:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:01:32,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:01:32,643 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2020-12-23 07:01:34,946 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-23 07:01:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:36,947 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-12-23 07:01:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:01:36,947 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-23 07:01:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:36,948 INFO L225 Difference]: With dead ends: 100 [2020-12-23 07:01:36,948 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:01:36,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:01:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:01:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-12-23 07:01:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 07:01:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-23 07:01:36,956 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2020-12-23 07:01:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:36,956 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-23 07:01:36,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:01:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-23 07:01:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 07:01:36,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:36,957 INFO L422 BasicCegarLoop]: trace histogram [35, 27, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:37,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:01:37,162 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1327056630, now seen corresponding path program 25 times [2020-12-23 07:01:37,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:37,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901453040] [2020-12-23 07:01:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:01:38,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901453040] [2020-12-23 07:01:38,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194819329] [2020-12-23 07:01:38,017 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 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 07:01:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:38,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:01:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:01:38,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:38,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:01:38,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394134223] [2020-12-23 07:01:38,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:01:38,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:01:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:01:38,308 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-12-23 07:01:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:39,561 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-12-23 07:01:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:01:39,562 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-12-23 07:01:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:39,563 INFO L225 Difference]: With dead ends: 102 [2020-12-23 07:01:39,563 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:01:39,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:01:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:01:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-23 07:01:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:01:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 07:01:39,571 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-12-23 07:01:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:39,572 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 07:01:39,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:01:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 07:01:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 07:01:39,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:39,574 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:39,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:39,784 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 26 times [2020-12-23 07:01:39,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:39,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628408613] [2020-12-23 07:01:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:01:40,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628408613] [2020-12-23 07:01:40,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98654897] [2020-12-23 07:01:40,757 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 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 07:01:40,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:01:40,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 07:01:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:41,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:41,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 40 [2020-12-23 07:01:41,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925104322] [2020-12-23 07:01:41,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:01:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:01:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:01:41,386 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2020-12-23 07:01:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:43,112 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-12-23 07:01:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:01:43,113 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-23 07:01:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:43,114 INFO L225 Difference]: With dead ends: 104 [2020-12-23 07:01:43,114 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 07:01:43,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:01:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 07:01:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-23 07:01:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 07:01:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-23 07:01:43,121 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-12-23 07:01:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:43,121 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-23 07:01:43,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:01:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-23 07:01:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 07:01:43,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:43,122 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:43,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 07:01:43,324 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 27 times [2020-12-23 07:01:43,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:43,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629672672] [2020-12-23 07:01:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:01:44,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629672672] [2020-12-23 07:01:44,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814206060] [2020-12-23 07:01:44,303 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 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 07:01:44,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 07:01:44,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:44,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:01:44,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 493 proven. 64 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-23 07:01:47,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:47,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2020-12-23 07:01:47,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007654414] [2020-12-23 07:01:47,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:01:47,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:47,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:01:47,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:01:47,280 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2020-12-23 07:01:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:50,415 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-12-23 07:01:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:01:50,416 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-23 07:01:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:50,417 INFO L225 Difference]: With dead ends: 108 [2020-12-23 07:01:50,417 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 07:01:50,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:01:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 07:01:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-23 07:01:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 07:01:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-23 07:01:50,425 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-23 07:01:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:50,425 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-23 07:01:50,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:01:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-23 07:01:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 07:01:50,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:50,426 INFO L422 BasicCegarLoop]: trace histogram [39, 30, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:50,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:50,630 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:50,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1738844952, now seen corresponding path program 28 times [2020-12-23 07:01:50,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:50,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400787045] [2020-12-23 07:01:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:01:51,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400787045] [2020-12-23 07:01:51,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104735045] [2020-12-23 07:01:51,744 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 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 07:01:51,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:51,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:01:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:01:52,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:52,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 07:01:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258410920] [2020-12-23 07:01:52,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:01:52,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:01:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:01:52,034 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-23 07:01:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:53,662 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-12-23 07:01:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:01:53,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-12-23 07:01:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:53,665 INFO L225 Difference]: With dead ends: 112 [2020-12-23 07:01:53,665 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 07:01:53,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:01:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 07:01:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-23 07:01:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 07:01:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-23 07:01:53,672 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-23 07:01:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:53,673 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-23 07:01:53,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:01:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-23 07:01:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 07:01:53,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:53,674 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:53,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 07:01:53,890 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 29 times [2020-12-23 07:01:53,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:53,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919804482] [2020-12-23 07:01:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:01:55,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919804482] [2020-12-23 07:01:55,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847738509] [2020-12-23 07:01:55,007 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 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 07:02:15,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-23 07:02:15,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 07:02:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:02:16,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:16,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 40] total 41 [2020-12-23 07:02:16,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909369518] [2020-12-23 07:02:16,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:02:16,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:16,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:02:16,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:02:16,274 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 41 states. [2020-12-23 07:02:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:18,381 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-12-23 07:02:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:02:18,382 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-12-23 07:02:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:18,383 INFO L225 Difference]: With dead ends: 114 [2020-12-23 07:02:18,383 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 07:02:18,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:02:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 07:02:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-23 07:02:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 07:02:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-23 07:02:18,389 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-12-23 07:02:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:18,389 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-23 07:02:18,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:02:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-23 07:02:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 07:02:18,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:18,390 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:18,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:02:18,591 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 30 times [2020-12-23 07:02:18,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:18,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251093847] [2020-12-23 07:02:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:02:19,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251093847] [2020-12-23 07:02:19,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417881055] [2020-12-23 07:02:19,827 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 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 07:02:25,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-23 07:02:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 07:02:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 813 proven. 382 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-12-23 07:02:30,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:30,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21] total 54 [2020-12-23 07:02:30,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5903402] [2020-12-23 07:02:30,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:02:30,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:30,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:02:30,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:02:30,401 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 54 states. [2020-12-23 07:02:36,669 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-23 07:02:37,864 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-23 07:02:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:39,226 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-12-23 07:02:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:02:39,227 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 88 [2020-12-23 07:02:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:39,228 INFO L225 Difference]: With dead ends: 135 [2020-12-23 07:02:39,229 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 07:02:39,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=658, Invalid=3248, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:02:39,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 07:02:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-12-23 07:02:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 07:02:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-12-23 07:02:39,237 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2020-12-23 07:02:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:39,238 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-12-23 07:02:39,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:02:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-12-23 07:02:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 07:02:39,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:39,239 INFO L422 BasicCegarLoop]: trace histogram [44, 33, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:39,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:02:39,444 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1993007499, now seen corresponding path program 31 times [2020-12-23 07:02:39,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:39,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970099604] [2020-12-23 07:02:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:02:40,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970099604] [2020-12-23 07:02:40,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325532065] [2020-12-23 07:02:40,856 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 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 07:02:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:02:40,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:02:41,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:41,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 07:02:41,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377705443] [2020-12-23 07:02:41,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:02:41,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:41,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:02:41,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:02:41,227 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 37 states. [2020-12-23 07:02:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:43,462 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-12-23 07:02:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:02:43,463 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 94 [2020-12-23 07:02:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:43,464 INFO L225 Difference]: With dead ends: 124 [2020-12-23 07:02:43,464 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 07:02:43,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:02:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 07:02:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 07:02:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 07:02:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-23 07:02:43,473 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2020-12-23 07:02:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:43,474 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-23 07:02:43,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:02:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-23 07:02:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 07:02:43,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:43,475 INFO L422 BasicCegarLoop]: trace histogram [45, 34, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:43,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:02:43,686 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2146245714, now seen corresponding path program 32 times [2020-12-23 07:02:43,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:43,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568676486] [2020-12-23 07:02:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 1190 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:02:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568676486] [2020-12-23 07:02:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450652062] [2020-12-23 07:02:45,170 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 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 07:02:45,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:02:45,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:45,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-23 07:02:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:02:46,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:46,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 48] total 49 [2020-12-23 07:02:46,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946033987] [2020-12-23 07:02:46,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:02:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:02:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2222, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:02:46,323 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 49 states. [2020-12-23 07:02:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:49,488 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2020-12-23 07:02:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:02:49,489 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-23 07:02:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:49,490 INFO L225 Difference]: With dead ends: 126 [2020-12-23 07:02:49,490 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 07:02:49,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=130, Invalid=2222, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:02:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 07:02:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-23 07:02:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 07:02:49,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-23 07:02:49,500 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-12-23 07:02:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:49,500 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-23 07:02:49,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:02:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-23 07:02:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 07:02:49,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:49,501 INFO L422 BasicCegarLoop]: trace histogram [46, 35, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:49,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:02:49,716 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1466099985, now seen corresponding path program 33 times [2020-12-23 07:02:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:49,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224576003] [2020-12-23 07:02:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 1260 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:02:51,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224576003] [2020-12-23 07:02:51,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736946816] [2020-12-23 07:02:51,276 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 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 07:02:51,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 07:02:51,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:02:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 805 proven. 121 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-23 07:02:53,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:53,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2020-12-23 07:02:53,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730939494] [2020-12-23 07:02:53,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 07:02:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:53,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 07:02:53,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2168, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:02:53,905 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 50 states. [2020-12-23 07:02:58,668 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2020-12-23 07:03:01,326 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2020-12-23 07:03:03,791 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-23 07:03:06,197 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-23 07:03:09,191 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-23 07:03:11,183 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-23 07:03:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:12,883 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-12-23 07:03:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 07:03:12,884 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-23 07:03:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:12,885 INFO L225 Difference]: With dead ends: 133 [2020-12-23 07:03:12,885 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 07:03:12,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=420, Invalid=3362, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:03:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 07:03:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-12-23 07:03:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 07:03:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-23 07:03:12,894 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 98 [2020-12-23 07:03:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:12,894 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-23 07:03:12,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 07:03:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-23 07:03:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 07:03:12,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:12,895 INFO L422 BasicCegarLoop]: trace histogram [48, 36, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:13,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:03:13,100 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:13,100 INFO L82 PathProgramCache]: Analyzing trace with hash 144826137, now seen corresponding path program 34 times [2020-12-23 07:03:13,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:13,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532965993] [2020-12-23 07:03:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:03:14,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532965993] [2020-12-23 07:03:14,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657085404] [2020-12-23 07:03:14,996 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 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 07:03:15,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:15,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 07:03:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:03:15,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:15,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 07:03:15,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097837716] [2020-12-23 07:03:15,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:03:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:03:15,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:03:15,443 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 40 states. [2020-12-23 07:03:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:18,631 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2020-12-23 07:03:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:03:18,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 102 [2020-12-23 07:03:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:18,633 INFO L225 Difference]: With dead ends: 136 [2020-12-23 07:03:18,634 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 07:03:18,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:03:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 07:03:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-23 07:03:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 07:03:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-23 07:03:18,642 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2020-12-23 07:03:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:18,642 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-23 07:03:18,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:03:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-23 07:03:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 07:03:18,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:18,643 INFO L422 BasicCegarLoop]: trace histogram [49, 37, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:18,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:03:18,856 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:18,856 INFO L82 PathProgramCache]: Analyzing trace with hash 404950588, now seen corresponding path program 35 times [2020-12-23 07:03:18,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:18,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628583687] [2020-12-23 07:03:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 1406 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:03:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628583687] [2020-12-23 07:03:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179907726] [2020-12-23 07:03:20,587 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 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 07:03:53,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-12-23 07:03:53,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 07:03:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:03:53,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:53,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 42 [2020-12-23 07:03:53,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883999152] [2020-12-23 07:03:53,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:03:53,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:53,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:03:53,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:03:53,878 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 42 states. [2020-12-23 07:03:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:56,756 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2020-12-23 07:03:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:03:56,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 104 [2020-12-23 07:03:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:56,759 INFO L225 Difference]: With dead ends: 138 [2020-12-23 07:03:56,759 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 07:03:56,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:03:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 07:03:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-12-23 07:03:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 07:03:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-23 07:03:56,765 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2020-12-23 07:03:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:56,766 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-23 07:03:56,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:03:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-23 07:03:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 07:03:56,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:56,767 INFO L422 BasicCegarLoop]: trace histogram [50, 38, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:56,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:03:56,973 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:56,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1276444831, now seen corresponding path program 36 times [2020-12-23 07:03:56,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:56,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613901577] [2020-12-23 07:03:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 1482 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:03:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613901577] [2020-12-23 07:03:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793647098] [2020-12-23 07:03:58,702 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 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 07:04:04,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2020-12-23 07:04:04,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:04,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 07:04:04,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 779 proven. 1640 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 07:04:04,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:04,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43] total 44 [2020-12-23 07:04:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141048644] [2020-12-23 07:04:04,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:04:04,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:04:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:04:04,919 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 44 states. [2020-12-23 07:04:07,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:07,856 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2020-12-23 07:04:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:04:07,858 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 106 [2020-12-23 07:04:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:07,859 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:04:07,859 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 07:04:07,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:04:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 07:04:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-23 07:04:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 07:04:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-23 07:04:07,866 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 106 [2020-12-23 07:04:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:07,866 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-23 07:04:07,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:04:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-23 07:04:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 07:04:07,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:07,867 INFO L422 BasicCegarLoop]: trace histogram [51, 39, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:08,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:08,068 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1263789634, now seen corresponding path program 37 times [2020-12-23 07:04:08,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:08,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18730168] [2020-12-23 07:04:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:04:09,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18730168] [2020-12-23 07:04:09,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830371632] [2020-12-23 07:04:09,961 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 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 07:04:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:10,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 07:04:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:04:10,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:10,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 07:04:10,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564794125] [2020-12-23 07:04:10,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:04:10,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:10,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:04:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:04:10,369 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2020-12-23 07:04:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:13,372 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-12-23 07:04:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:04:13,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 108 [2020-12-23 07:04:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:13,375 INFO L225 Difference]: With dead ends: 142 [2020-12-23 07:04:13,375 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 07:04:13,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:04:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 07:04:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-23 07:04:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 07:04:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-12-23 07:04:13,384 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 108 [2020-12-23 07:04:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:13,384 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-12-23 07:04:13,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:04:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-12-23 07:04:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 07:04:13,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:13,385 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:13,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:13,595 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:13,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 38 times [2020-12-23 07:04:13,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:13,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615003945] [2020-12-23 07:04:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:04:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615003945] [2020-12-23 07:04:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340482626] [2020-12-23 07:04:15,476 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 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 07:04:15,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:15,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-23 07:04:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:16,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:16,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 55] total 56 [2020-12-23 07:04:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040738584] [2020-12-23 07:04:16,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:04:16,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:04:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:04:16,871 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2020-12-23 07:04:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:20,941 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2020-12-23 07:04:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 07:04:20,943 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-23 07:04:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:20,944 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:04:20,944 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 07:04:20,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:04:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 07:04:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-12-23 07:04:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 07:04:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-23 07:04:20,953 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 110 [2020-12-23 07:04:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:20,953 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-23 07:04:20,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:04:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-23 07:04:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 07:04:20,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:20,954 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:21,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 07:04:21,157 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 39 times [2020-12-23 07:04:21,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:21,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276169877] [2020-12-23 07:04:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:04:23,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276169877] [2020-12-23 07:04:23,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526616973] [2020-12-23 07:04:23,203 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 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 07:04:23,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-23 07:04:23,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:04:23,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 144 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-23 07:04:25,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:25,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2020-12-23 07:04:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507928329] [2020-12-23 07:04:25,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:04:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:04:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:04:25,428 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2020-12-23 07:04:30,088 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 63 DAG size of output: 15 [2020-12-23 07:04:32,310 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 12 [2020-12-23 07:04:34,241 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2020-12-23 07:04:36,539 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-12-23 07:04:38,422 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-23 07:04:40,023 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2020-12-23 07:04:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:44,542 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-12-23 07:04:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 07:04:44,543 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-23 07:04:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:44,544 INFO L225 Difference]: With dead ends: 150 [2020-12-23 07:04:44,544 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 07:04:44,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=932, Invalid=3898, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:04:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 07:04:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-12-23 07:04:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 07:04:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-12-23 07:04:44,551 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2020-12-23 07:04:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:44,552 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-12-23 07:04:44,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:04:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-12-23 07:04:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 07:04:44,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:44,553 INFO L422 BasicCegarLoop]: trace histogram [55, 42, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:44,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:44,753 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash -675248560, now seen corresponding path program 40 times [2020-12-23 07:04:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:44,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772804736] [2020-12-23 07:04:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1075 proven. 1806 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:04:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772804736] [2020-12-23 07:04:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840306262] [2020-12-23 07:04:47,013 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 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 07:04:47,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:04:47,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:47,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 07:04:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1075 proven. 1806 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:04:47,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:47,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 07:04:47,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123581076] [2020-12-23 07:04:47,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:04:47,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:47,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:04:47,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:04:47,541 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 46 states. [2020-12-23 07:04:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:51,294 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2020-12-23 07:04:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:04:51,296 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 116 [2020-12-23 07:04:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:51,297 INFO L225 Difference]: With dead ends: 150 [2020-12-23 07:04:51,297 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 07:04:51,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:04:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 07:04:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-12-23 07:04:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 07:04:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-12-23 07:04:51,308 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2020-12-23 07:04:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:51,308 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-12-23 07:04:51,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:04:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-12-23 07:04:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 07:04:51,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:51,309 INFO L422 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:51,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:51,524 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:51,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 41 times [2020-12-23 07:04:51,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:51,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962345978] [2020-12-23 07:04:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:04:53,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962345978] [2020-12-23 07:04:53,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468254146] [2020-12-23 07:04:53,868 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 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