/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/loop-acceleration/overflow_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:51:32,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:51:33,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:51:33,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:51:33,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:51:33,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:51:33,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:51:33,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:51:33,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:51:33,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:51:33,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:51:33,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:51:33,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:51:33,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:51:33,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:51:33,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:51:33,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:51:33,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:51:33,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:51:33,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:51:33,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:51:33,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:51:33,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:51:33,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:51:33,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:51:33,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:51:33,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:51:33,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:51:33,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:51:33,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:51:33,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:51:33,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:51:33,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:51:33,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:51:33,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:51:33,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:51:33,170 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 06:51:33,197 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:51:33,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:51:33,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:51:33,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:51:33,200 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:51:33,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:51:33,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:51:33,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:51:33,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:51:33,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:51:33,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:51:33,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:51:33,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:51:33,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:51:33,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:51:33,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:51:33,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:51:33,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:51:33,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:51:33,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:51:33,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:51:33,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:51:33,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:51:33,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:51:33,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:51:33,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:51:33,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:51:33,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:51:33,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:51:33,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:51:33,639 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:51:33,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/overflow_1-1.c [2020-12-23 06:51:33,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b21077ed8/4bc443b5ff564e74bd1b9b4f8780e37b/FLAG7adea1db2 [2020-12-23 06:51:34,398 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:51:34,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/overflow_1-1.c [2020-12-23 06:51:34,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b21077ed8/4bc443b5ff564e74bd1b9b4f8780e37b/FLAG7adea1db2 [2020-12-23 06:51:34,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b21077ed8/4bc443b5ff564e74bd1b9b4f8780e37b [2020-12-23 06:51:34,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:51:34,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:51:34,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:34,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:51:34,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:51:34,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:34" (1/1) ... [2020-12-23 06:51:34,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25efa617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:34, skipping insertion in model container [2020-12-23 06:51:34,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:34" (1/1) ... [2020-12-23 06:51:34,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:51:34,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:51:34,962 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/loop-acceleration/overflow_1-1.c[324,337] [2020-12-23 06:51:34,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:34,985 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:51:34,999 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/loop-acceleration/overflow_1-1.c[324,337] [2020-12-23 06:51:35,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:35,016 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:51:35,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35 WrapperNode [2020-12-23 06:51:35,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:35,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:35,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:51:35,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:51:35,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:35,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:51:35,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:51:35,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:51:35,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (1/1) ... [2020-12-23 06:51:35,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:51:35,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:51:35,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:51:35,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:51:35,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (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 06:51:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:51:35,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:51:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:51:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:51:35,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:51:35,402 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:51:35,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:35 BoogieIcfgContainer [2020-12-23 06:51:35,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:51:35,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:51:35,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:51:35,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:51:35,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:51:34" (1/3) ... [2020-12-23 06:51:35,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46436ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:35, skipping insertion in model container [2020-12-23 06:51:35,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:35" (2/3) ... [2020-12-23 06:51:35,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46436ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:35, skipping insertion in model container [2020-12-23 06:51:35,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:35" (3/3) ... [2020-12-23 06:51:35,414 INFO L111 eAbstractionObserver]: Analyzing ICFG overflow_1-1.c [2020-12-23 06:51:35,422 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:51:35,429 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:51:35,453 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:51:35,532 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:51:35,532 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:51:35,532 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:51:35,532 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:51:35,532 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:51:35,533 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:51:35,533 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:51:35,533 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:51:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-23 06:51:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:51:35,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:35,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:51:35,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 06:51:35,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:35,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728087984] [2020-12-23 06:51:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:36,127 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 06:51:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728087984] [2020-12-23 06:51:36,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:36,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:51:36,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96481047] [2020-12-23 06:51:36,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:36,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:36,166 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-23 06:51:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:36,225 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 06:51:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:36,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:51:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:36,248 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:36,248 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:51:36,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:51:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:51:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:51:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:51:36,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 06:51:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:36,300 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:51:36,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:51:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:51:36,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:36,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:36,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:51:36,303 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 06:51:36,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:36,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824629371] [2020-12-23 06:51:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:36,496 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 06:51:36,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824629371] [2020-12-23 06:51:36,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434587685] [2020-12-23 06:51:36,499 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 06:51:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:51:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:36,685 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 06:51:36,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:36,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:51:36,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902144677] [2020-12-23 06:51:36,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:51:36,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:51:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:51:36,690 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-23 06:51:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:36,712 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-12-23 06:51:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:51:36,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:51:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:36,713 INFO L225 Difference]: With dead ends: 14 [2020-12-23 06:51:36,713 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:51:36,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:51:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:51:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:51:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:51:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:51:36,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-23 06:51:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:36,719 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:51:36,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:51:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:51:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:51:36,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:36,720 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:36,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:51:36,934 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:36,936 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2020-12-23 06:51:36,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:36,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966804426] [2020-12-23 06:51:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:37,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966804426] [2020-12-23 06:51:37,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968324952] [2020-12-23 06:51:37,132 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 06:51:37,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:37,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:51:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:37,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:37,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:51:37,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202241963] [2020-12-23 06:51:37,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:51:37,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:51:37,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:37,283 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-23 06:51:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:37,335 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-23 06:51:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:51:37,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 06:51:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:37,337 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:51:37,338 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:51:37,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:51:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:51:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:51:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-23 06:51:37,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-12-23 06:51:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:37,347 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-23 06:51:37,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:51:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-23 06:51:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:51:37,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:37,348 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:37,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:37,555 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 3 times [2020-12-23 06:51:37,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:37,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152666304] [2020-12-23 06:51:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:37,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152666304] [2020-12-23 06:51:37,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363000887] [2020-12-23 06:51:37,668 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 06:51:37,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:51:37,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:37,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:51:37,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:37,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:37,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:51:37,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906101969] [2020-12-23 06:51:37,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:51:37,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:37,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:51:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:37,819 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-23 06:51:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:37,881 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-12-23 06:51:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:51:37,881 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 06:51:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:37,882 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:37,882 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:51:37,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:51:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:51:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:51:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 06:51:37,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-12-23 06:51:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:37,888 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 06:51:37,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:51:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 06:51:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:51:37,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:37,890 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:38,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:38,099 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 4 times [2020-12-23 06:51:38,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:38,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248839498] [2020-12-23 06:51:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:38,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248839498] [2020-12-23 06:51:38,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793663554] [2020-12-23 06:51:38,346 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 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 06:51:38,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:38,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:51:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:38,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:38,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:51:38,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275672777] [2020-12-23 06:51:38,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:51:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:51:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:38,463 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-23 06:51:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:38,541 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-23 06:51:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:51:38,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 06:51:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:38,543 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:51:38,543 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:51:38,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:51:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 06:51:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:51:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 06:51:38,549 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-12-23 06:51:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:38,549 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 06:51:38,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:51:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 06:51:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:51:38,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:38,550 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:38,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:38,766 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:38,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:38,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 5 times [2020-12-23 06:51:38,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:38,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547889240] [2020-12-23 06:51:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:38,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547889240] [2020-12-23 06:51:38,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627386996] [2020-12-23 06:51:38,979 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 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 06:51:39,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:51:39,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:39,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:51:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:39,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:39,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:51:39,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762908596] [2020-12-23 06:51:39,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:51:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:39,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:51:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:39,273 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2020-12-23 06:51:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:39,382 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 06:51:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:51:39,382 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-23 06:51:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:39,383 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:51:39,383 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:51:39,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:51:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 06:51:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:51:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 06:51:39,389 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-12-23 06:51:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:39,390 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 06:51:39,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:51:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 06:51:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:51:39,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:39,391 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:39,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:51:39,597 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 6 times [2020-12-23 06:51:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:39,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865799762] [2020-12-23 06:51:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:39,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865799762] [2020-12-23 06:51:39,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822035482] [2020-12-23 06:51:39,877 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 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 06:51:40,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:51:40,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:51:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:40,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:40,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:51:40,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169411662] [2020-12-23 06:51:40,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:51:40,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:40,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:51:40,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:51:40,094 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-23 06:51:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:40,228 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 06:51:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:51:40,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-23 06:51:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:40,230 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:51:40,230 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:51:40,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:51:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:51:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 06:51:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:51:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 06:51:40,237 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-12-23 06:51:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:40,237 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 06:51:40,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:51:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 06:51:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:51:40,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:40,238 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:40,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:40,449 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 7 times [2020-12-23 06:51:40,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:40,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098127294] [2020-12-23 06:51:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098127294] [2020-12-23 06:51:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161785491] [2020-12-23 06:51:40,811 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 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 06:51:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:40,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:51:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:41,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:41,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:51:41,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670725237] [2020-12-23 06:51:41,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:51:41,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:41,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:51:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:51:41,027 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-23 06:51:41,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:41,198 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-12-23 06:51:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:51:41,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-23 06:51:41,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:41,200 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:51:41,200 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:51:41,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:51:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:51:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 06:51:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:51:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 06:51:41,208 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-12-23 06:51:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:41,208 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 06:51:41,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:51:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 06:51:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:51:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:41,209 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:41,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:41,415 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 8 times [2020-12-23 06:51:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:41,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322943133] [2020-12-23 06:51:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322943133] [2020-12-23 06:51:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450664856] [2020-12-23 06:51:41,737 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 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 06:51:41,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:41,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:51:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:42,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:42,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:51:42,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861362313] [2020-12-23 06:51:42,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:51:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:51:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:51:42,044 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-23 06:51:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:42,253 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 06:51:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:51:42,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-23 06:51:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:42,256 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:51:42,256 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:51:42,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:51:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:51:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 06:51:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:51:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 06:51:42,263 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-12-23 06:51:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:42,263 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 06:51:42,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:51:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 06:51:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:51:42,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:42,264 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:42,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:51:42,471 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 9 times [2020-12-23 06:51:42,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:42,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859286231] [2020-12-23 06:51:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:42,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859286231] [2020-12-23 06:51:42,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355752380] [2020-12-23 06:51:42,860 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 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 06:51:43,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:51:43,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:51:43,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:43,104 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:51:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:43,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:43,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 22 [2020-12-23 06:51:43,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134346355] [2020-12-23 06:51:43,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:51:43,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:51:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:51:43,145 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 22 states. [2020-12-23 06:51:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:43,408 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-23 06:51:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:51:43,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2020-12-23 06:51:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:43,409 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:51:43,409 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:51:43,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:51:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:51:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 06:51:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:51:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-23 06:51:43,415 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-12-23 06:51:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:43,416 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-23 06:51:43,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:51:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-23 06:51:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:51:43,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:43,417 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:43,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:43,622 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 10 times [2020-12-23 06:51:43,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:43,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415999470] [2020-12-23 06:51:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:44,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415999470] [2020-12-23 06:51:44,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296457182] [2020-12-23 06:51:44,110 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 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 06:51:44,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:44,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:44,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:51:44,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:44,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:44,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:51:44,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791410469] [2020-12-23 06:51:44,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:51:44,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:44,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:51:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:51:44,464 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-23 06:51:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:44,751 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-23 06:51:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:51:44,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-23 06:51:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:44,758 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:51:44,758 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:51:44,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:51:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:51:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 06:51:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:51:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-23 06:51:44,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-12-23 06:51:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:44,775 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-23 06:51:44,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:51:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-23 06:51:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:51:44,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:44,776 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:44,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:44,990 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 11 times [2020-12-23 06:51:44,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:44,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946042191] [2020-12-23 06:51:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:45,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946042191] [2020-12-23 06:51:45,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387295714] [2020-12-23 06:51:45,498 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 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 06:51:47,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:51:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:47,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:51:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:47,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:47,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:51:47,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306076575] [2020-12-23 06:51:47,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:51:47,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:47,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:51:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:51:47,758 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-23 06:51:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:48,155 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 06:51:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:51:48,156 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-23 06:51:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:48,157 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:51:48,157 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:51:48,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 21 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:51:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:51:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 06:51:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:51:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-23 06:51:48,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-12-23 06:51:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:48,163 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-23 06:51:48,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:51:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-23 06:51:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:51:48,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:48,164 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:48,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:51:48,370 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 12 times [2020-12-23 06:51:48,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:48,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164831358] [2020-12-23 06:51:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164831358] [2020-12-23 06:51:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437521336] [2020-12-23 06:51:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:51:49,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:51:49,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:49,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:51:49,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:49,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:49,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:51:49,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219173053] [2020-12-23 06:51:49,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:51:49,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:51:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:51:49,504 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-23 06:51:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:49,887 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 06:51:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:51:49,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-23 06:51:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:49,888 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:51:49,888 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:51:49,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:51:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:51:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 06:51:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:51:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-23 06:51:49,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-12-23 06:51:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:49,895 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-23 06:51:49,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:51:49,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-23 06:51:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:51:49,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:49,896 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:50,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:51:50,102 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 13 times [2020-12-23 06:51:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:50,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599730926] [2020-12-23 06:51:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:50,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599730926] [2020-12-23 06:51:50,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513284615] [2020-12-23 06:51:50,788 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 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 06:51:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:50,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:51:50,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:51,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:51,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:51:51,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461216872] [2020-12-23 06:51:51,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:51:51,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:51:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:51:51,313 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-23 06:51:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:51,841 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-23 06:51:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:51:51,841 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-23 06:51:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:51,842 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:51:51,842 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:51:51,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:51:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:51:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 06:51:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:51:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-23 06:51:51,849 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-12-23 06:51:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:51,849 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-23 06:51:51,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:51:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-23 06:51:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 06:51:51,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:51,850 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:52,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:51:52,056 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:52,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 14 times [2020-12-23 06:51:52,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:52,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71174430] [2020-12-23 06:51:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:52,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71174430] [2020-12-23 06:51:52,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541648786] [2020-12-23 06:51:52,851 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 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 06:51:52,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:52,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:52,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:51:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:53,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:53,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:51:53,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88998563] [2020-12-23 06:51:53,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:51:53,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:51:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:51:53,450 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-23 06:51:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:54,013 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 06:51:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:51:54,014 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-23 06:51:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:54,014 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:51:54,014 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:51:54,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:51:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:51:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:51:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:51:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-23 06:51:54,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-12-23 06:51:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:54,021 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-23 06:51:54,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:51:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-23 06:51:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:51:54,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:54,023 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:54,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:54,227 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 15 times [2020-12-23 06:51:54,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:54,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981792459] [2020-12-23 06:51:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:55,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981792459] [2020-12-23 06:51:55,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368105927] [2020-12-23 06:51:55,082 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 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 06:51:55,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:51:55,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:51:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:55,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:55,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:51:55,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626457711] [2020-12-23 06:51:55,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:51:55,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:55,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:51:55,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:51:55,801 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-23 06:51:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:56,401 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 06:51:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:51:56,402 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-23 06:51:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:56,402 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:51:56,402 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:51:56,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:51:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:51:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 06:51:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:51:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 06:51:56,408 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-12-23 06:51:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:56,409 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 06:51:56,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:51:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 06:51:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:51:56,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:56,410 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:56,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:51:56,618 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 16 times [2020-12-23 06:51:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:56,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391361280] [2020-12-23 06:51:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:57,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391361280] [2020-12-23 06:51:57,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426719324] [2020-12-23 06:51:57,632 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 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 06:51:57,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:57,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:51:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:58,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:58,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:51:58,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628178232] [2020-12-23 06:51:58,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:51:58,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:51:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:51:58,139 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-23 06:51:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:58,922 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-12-23 06:51:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:51:58,923 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-23 06:51:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:58,924 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:51:58,924 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:51:58,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:51:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:51:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 06:51:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:51:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 06:51:58,930 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-12-23 06:51:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:58,931 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 06:51:58,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:51:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 06:51:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:51:58,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:58,932 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:59,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:51:59,142 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 17 times [2020-12-23 06:51:59,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:59,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898901520] [2020-12-23 06:51:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:00,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898901520] [2020-12-23 06:52:00,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544796490] [2020-12-23 06:52:00,117 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 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 06:52:16,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:52:16,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:16,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-23 06:52:16,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:17,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:17,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:52:17,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538909477] [2020-12-23 06:52:17,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:52:17,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:52:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:52:17,663 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2020-12-23 06:52:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:18,473 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 06:52:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:52:18,474 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-23 06:52:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:18,475 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:52:18,475 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:52:18,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 32 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:52:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:52:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 06:52:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:52:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-23 06:52:18,480 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-12-23 06:52:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:18,480 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-23 06:52:18,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:52:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-23 06:52:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:52:18,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:18,481 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:18,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:52:18,684 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 18 times [2020-12-23 06:52:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:18,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354674841] [2020-12-23 06:52:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:19,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354674841] [2020-12-23 06:52:19,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264650911] [2020-12-23 06:52:19,858 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 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 06:52:21,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:52:21,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:21,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:52:21,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:22,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:22,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:52:22,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212806100] [2020-12-23 06:52:22,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:52:22,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:22,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:52:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:52:22,152 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-23 06:52:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:23,111 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-23 06:52:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:52:23,112 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-23 06:52:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:23,113 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:52:23,113 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:52:23,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:52:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:52:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 06:52:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:52:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-23 06:52:23,121 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-12-23 06:52:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:23,121 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-23 06:52:23,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:52:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-23 06:52:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:52:23,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:23,122 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:23,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:23,326 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:23,328 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 19 times [2020-12-23 06:52:23,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:23,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458565139] [2020-12-23 06:52:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:24,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458565139] [2020-12-23 06:52:24,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301058810] [2020-12-23 06:52:24,524 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 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 06:52:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:24,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 06:52:24,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:25,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:25,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:52:25,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23720711] [2020-12-23 06:52:25,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:52:25,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:25,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:52:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:52:25,231 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-23 06:52:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:26,275 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-12-23 06:52:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:52:26,276 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-23 06:52:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:26,277 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:52:26,277 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:52:26,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:52:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:52:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 06:52:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:52:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-23 06:52:26,284 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-12-23 06:52:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:26,284 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-23 06:52:26,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:52:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-23 06:52:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:52:26,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:26,285 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:26,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:26,490 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 20 times [2020-12-23 06:52:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:26,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465481276] [2020-12-23 06:52:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:27,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465481276] [2020-12-23 06:52:27,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376163364] [2020-12-23 06:52:27,898 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 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 06:52:27,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:27,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 06:52:27,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:28,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:28,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:52:28,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541500933] [2020-12-23 06:52:28,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:52:28,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:28,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:52:28,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:52:28,822 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2020-12-23 06:52:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:30,036 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 06:52:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:52:30,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-23 06:52:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:30,038 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:52:30,038 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:52:30,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:52:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:52:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 06:52:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 06:52:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-23 06:52:30,045 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-12-23 06:52:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:30,046 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-23 06:52:30,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:52:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-23 06:52:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:52:30,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:30,046 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:30,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:52:30,249 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:30,250 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 21 times [2020-12-23 06:52:30,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:30,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125643982] [2020-12-23 06:52:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125643982] [2020-12-23 06:52:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277455574] [2020-12-23 06:52:31,811 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 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 06:52:33,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:52:33,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:33,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-23 06:52:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:34,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:34,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:52:34,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884452147] [2020-12-23 06:52:34,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:52:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:52:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:52:34,605 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2020-12-23 06:52:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:35,948 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-23 06:52:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:52:35,951 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-23 06:52:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:35,952 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:52:35,952 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:52:35,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 25 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:52:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:52:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 06:52:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 06:52:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-23 06:52:35,958 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-12-23 06:52:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:35,958 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-23 06:52:35,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:52:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-23 06:52:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 06:52:35,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:35,959 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:36,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:52:36,159 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:36,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 22 times [2020-12-23 06:52:36,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:36,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676979179] [2020-12-23 06:52:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:37,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676979179] [2020-12-23 06:52:37,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144341111] [2020-12-23 06:52:37,757 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 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 06:52:37,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:37,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:37,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 112 conjunts are in the unsatisfiable core [2020-12-23 06:52:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:38,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:38,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:52:38,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238314444] [2020-12-23 06:52:38,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:52:38,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:52:38,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:52:38,991 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2020-12-23 06:52:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:40,396 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-12-23 06:52:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:52:40,397 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-23 06:52:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:40,398 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:52:40,398 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:52:40,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 23 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:52:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:52:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 06:52:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 06:52:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-23 06:52:40,410 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-12-23 06:52:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:40,411 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-23 06:52:40,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:52:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-23 06:52:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 06:52:40,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:40,411 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:40,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:40,615 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1231819568, now seen corresponding path program 23 times [2020-12-23 06:52:40,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:40,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290493096] [2020-12-23 06:52:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:42,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290493096] [2020-12-23 06:52:42,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897700143] [2020-12-23 06:52:42,457 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 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 06:55:08,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:55:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:08,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 136 conjunts are in the unsatisfiable core [2020-12-23 06:55:08,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:10,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:10,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:55:10,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114977227] [2020-12-23 06:55:10,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:55:10,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:10,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:55:10,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:55:10,566 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2020-12-23 06:55:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:12,187 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 06:55:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:55:12,189 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2020-12-23 06:55:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:12,190 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:55:12,190 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:55:12,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 44 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:55:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:55:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 06:55:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 06:55:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-23 06:55:12,196 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-12-23 06:55:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:12,197 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-23 06:55:12,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:55:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-23 06:55:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 06:55:12,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:12,197 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:12,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:55:12,408 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:12,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1685660720, now seen corresponding path program 24 times [2020-12-23 06:55:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:12,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865099547] [2020-12-23 06:55:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:14,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865099547] [2020-12-23 06:55:14,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822705572] [2020-12-23 06:55:14,413 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 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 06:55:25,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:55:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:25,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 06:55:25,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:25,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:26,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:26,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51] total 52 [2020-12-23 06:55:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425511512] [2020-12-23 06:55:26,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:55:26,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:55:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:55:26,018 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 52 states. [2020-12-23 06:55:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:27,824 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-12-23 06:55:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:55:27,825 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 53 [2020-12-23 06:55:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:27,825 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:55:27,826 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:55:27,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:55:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:55:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 06:55:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 06:55:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-23 06:55:27,832 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-12-23 06:55:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:27,833 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-23 06:55:27,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:55:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-23 06:55:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 06:55:27,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:27,833 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:28,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:28,034 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash 770573200, now seen corresponding path program 25 times [2020-12-23 06:55:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:28,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115611311] [2020-12-23 06:55:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:30,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115611311] [2020-12-23 06:55:30,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941021979] [2020-12-23 06:55:30,158 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 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 06:55:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:30,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 129 conjunts are in the unsatisfiable core [2020-12-23 06:55:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:31,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:31,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:55:31,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584171174] [2020-12-23 06:55:31,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:55:31,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:55:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:55:31,916 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 53 states. [2020-12-23 06:55:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:33,842 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-23 06:55:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:55:33,843 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2020-12-23 06:55:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:33,844 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:55:33,844 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:55:33,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 28 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:55:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:55:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 06:55:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 06:55:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-12-23 06:55:33,854 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-12-23 06:55:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:33,855 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-12-23 06:55:33,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:55:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-12-23 06:55:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 06:55:33,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:33,855 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:34,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:55:34,059 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1839762160, now seen corresponding path program 26 times [2020-12-23 06:55:34,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:34,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312996286] [2020-12-23 06:55:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:36,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312996286] [2020-12-23 06:55:36,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704397595] [2020-12-23 06:55:36,445 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 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 06:55:36,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:36,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:36,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 128 conjunts are in the unsatisfiable core [2020-12-23 06:55:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:37,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:37,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:55:37,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379893528] [2020-12-23 06:55:37,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:55:37,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:55:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:55:37,784 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 55 states. [2020-12-23 06:55:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:39,878 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 06:55:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:55:39,879 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 57 [2020-12-23 06:55:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:39,880 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:55:39,880 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:55:39,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:55:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:55:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 06:55:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 06:55:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-12-23 06:55:39,886 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-12-23 06:55:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:39,886 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-12-23 06:55:39,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:55:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-12-23 06:55:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 06:55:39,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:39,887 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:40,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:55:40,091 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1461798320, now seen corresponding path program 27 times [2020-12-23 06:55:40,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:40,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824408061] [2020-12-23 06:55:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:42,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824408061] [2020-12-23 06:55:42,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217647509] [2020-12-23 06:55:42,613 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 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 06:55:44,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:55:44,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:44,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 110 conjunts are in the unsatisfiable core [2020-12-23 06:55:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:44,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:44,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:55:44,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277634888] [2020-12-23 06:55:44,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:55:44,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:44,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:55:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:55:44,485 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 57 states. [2020-12-23 06:55:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:46,763 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-12-23 06:55:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:55:46,764 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 59 [2020-12-23 06:55:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:46,765 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:55:46,765 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:55:46,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:55:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:55:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 06:55:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 06:55:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-23 06:55:46,770 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-12-23 06:55:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:46,771 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-23 06:55:46,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:55:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-23 06:55:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 06:55:46,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:46,771 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:46,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:55:46,976 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash -280587856, now seen corresponding path program 28 times [2020-12-23 06:55:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:46,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017499919] [2020-12-23 06:55:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017499919] [2020-12-23 06:55:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765338101] [2020-12-23 06:55:49,816 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 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 06:55:49,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:49,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 133 conjunts are in the unsatisfiable core [2020-12-23 06:55:49,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:51,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:51,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:55:51,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452958793] [2020-12-23 06:55:51,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:55:51,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:55:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:55:51,342 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 59 states. [2020-12-23 06:55:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:53,802 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-12-23 06:55:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:55:53,803 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 61 [2020-12-23 06:55:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:53,805 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:55:53,805 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:55:53,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 21 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:55:53,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:55:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 06:55:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 06:55:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-12-23 06:55:53,811 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-12-23 06:55:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:53,811 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-12-23 06:55:53,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:55:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-12-23 06:55:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 06:55:53,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:53,812 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:54,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:55:54,026 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 991301904, now seen corresponding path program 29 times [2020-12-23 06:55:54,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:54,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653113338] [2020-12-23 06:55:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653113338] [2020-12-23 06:55:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104407115] [2020-12-23 06:55:57,005 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 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