/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:33:56,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:33:56,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:33:56,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:33:56,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:33:56,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:33:56,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:33:56,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:33:56,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:33:56,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:33:56,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:33:56,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:33:56,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:33:56,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:33:56,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:33:56,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:33:56,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:33:56,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:33:56,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:33:56,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:33:56,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:33:56,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:33:56,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:33:56,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:33:56,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:33:56,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:33:56,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:33:56,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:33:56,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:33:56,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:33:56,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:33:56,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:33:56,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:33:56,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:33:56,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:33:56,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:33:56,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:33:56,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:33:56,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:33:56,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:33:56,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:33:56,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:33:56,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:33:56,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:33:56,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:33:56,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:33:56,672 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:33:56,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:33:56,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:33:56,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:33:56,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:33:56,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:33:56,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:33:56,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:33:56,675 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:33:56,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:33:56,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:33:56,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:33:56,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:33:56,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:56,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:33:56,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:33:56,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:33:56,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:33:56,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:33:56,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:33:56,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:33:56,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:33:57,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:33:57,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:33:57,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:33:57,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:33:57,194 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:33:57,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2020-12-21 21:33:57,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b54a70081/b648a9da7340470c8801e5ec9b5b4c30/FLAG06bee0922 [2020-12-21 21:33:57,925 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:33:57,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2020-12-21 21:33:57,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b54a70081/b648a9da7340470c8801e5ec9b5b4c30/FLAG06bee0922 [2020-12-21 21:33:58,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b54a70081/b648a9da7340470c8801e5ec9b5b4c30 [2020-12-21 21:33:58,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:33:58,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:33:58,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:58,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:33:58,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:33:58,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53604c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58, skipping insertion in model container [2020-12-21 21:33:58,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:33:58,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:33:58,602 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2020-12-21 21:33:58,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:58,637 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:33:58,655 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2020-12-21 21:33:58,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:58,707 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:33:58,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58 WrapperNode [2020-12-21 21:33:58,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:58,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:58,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:33:58,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:33:58,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:58,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:33:58,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:33:58,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:33:58,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... [2020-12-21 21:33:58,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:33:58,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:33:58,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:33:58,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:33:58,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:33:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:33:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:33:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:33:58,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:33:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:33:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:33:59,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:33:59,353 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-21 21:33:59,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:59 BoogieIcfgContainer [2020-12-21 21:33:59,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:33:59,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:33:59,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:33:59,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:33:59,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:33:58" (1/3) ... [2020-12-21 21:33:59,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0de74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:59, skipping insertion in model container [2020-12-21 21:33:59,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:58" (2/3) ... [2020-12-21 21:33:59,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0de74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:59, skipping insertion in model container [2020-12-21 21:33:59,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:59" (3/3) ... [2020-12-21 21:33:59,381 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2020-12-21 21:33:59,398 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:33:59,410 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:33:59,440 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:33:59,470 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:33:59,470 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:33:59,470 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:33:59,470 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:33:59,470 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:33:59,471 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:33:59,471 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:33:59,471 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:33:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-21 21:33:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:33:59,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:59,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:59,497 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2020-12-21 21:33:59,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:59,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146372704] [2020-12-21 21:33:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:59,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146372704] [2020-12-21 21:33:59,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:33:59,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:33:59,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267674861] [2020-12-21 21:33:59,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:33:59,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:59,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:33:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:59,829 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-21 21:33:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:59,995 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2020-12-21 21:33:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:33:59,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:33:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:00,009 INFO L225 Difference]: With dead ends: 51 [2020-12-21 21:34:00,010 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:34:00,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:34:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:34:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:34:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-21 21:34:00,070 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2020-12-21 21:34:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:00,070 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-21 21:34:00,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:34:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-21 21:34:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:34:00,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:00,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:00,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:34:00,075 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2020-12-21 21:34:00,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:00,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588790747] [2020-12-21 21:34:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:34:00,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588790747] [2020-12-21 21:34:00,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539866104] [2020-12-21 21:34:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:34:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:34:00,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:00,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:34:00,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578442284] [2020-12-21 21:34:00,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:34:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:34:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:00,375 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2020-12-21 21:34:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:00,446 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-21 21:34:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:34:00,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-21 21:34:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:00,448 INFO L225 Difference]: With dead ends: 54 [2020-12-21 21:34:00,448 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:34:00,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:34:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 21:34:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:34:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-21 21:34:00,457 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2020-12-21 21:34:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:00,458 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-21 21:34:00,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:34:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-21 21:34:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:34:00,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:00,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:00,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:34:00,676 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2020-12-21 21:34:00,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:00,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536729673] [2020-12-21 21:34:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 21:34:00,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536729673] [2020-12-21 21:34:00,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285211831] [2020-12-21 21:34:00,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:00,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:34:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 21:34:00,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:00,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:34:00,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830459963] [2020-12-21 21:34:00,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:34:00,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:34:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:00,928 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-12-21 21:34:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:01,030 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-12-21 21:34:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:34:01,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-21 21:34:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:01,033 INFO L225 Difference]: With dead ends: 65 [2020-12-21 21:34:01,033 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:34:01,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:34:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 21:34:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:34:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-21 21:34:01,057 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2020-12-21 21:34:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:01,057 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-21 21:34:01,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:34:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-21 21:34:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:34:01,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:01,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:01,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:01,274 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2020-12-21 21:34:01,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:01,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062370886] [2020-12-21 21:34:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:34:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062370886] [2020-12-21 21:34:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989217121] [2020-12-21 21:34:01,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:01,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:34:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:01,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:34:01,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:34:01,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:01,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:34:01,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441230434] [2020-12-21 21:34:01,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:34:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:34:01,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:01,589 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-12-21 21:34:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:01,672 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-12-21 21:34:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:34:01,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:34:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:01,674 INFO L225 Difference]: With dead ends: 76 [2020-12-21 21:34:01,674 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:34:01,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:34:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:34:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:34:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-12-21 21:34:01,681 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2020-12-21 21:34:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:01,682 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-12-21 21:34:01,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:34:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-12-21 21:34:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:34:01,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:01,684 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:01,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:01,898 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2020-12-21 21:34:01,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:01,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734426529] [2020-12-21 21:34:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:34:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734426529] [2020-12-21 21:34:01,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788901471] [2020-12-21 21:34:01,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:02,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:02,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:34:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:34:02,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:02,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:34:02,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332102667] [2020-12-21 21:34:02,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:34:02,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:34:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:02,111 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-12-21 21:34:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:02,197 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-12-21 21:34:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:34:02,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 21:34:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:02,199 INFO L225 Difference]: With dead ends: 87 [2020-12-21 21:34:02,199 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:34:02,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:34:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-21 21:34:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:34:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-12-21 21:34:02,207 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2020-12-21 21:34:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:02,207 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-12-21 21:34:02,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:34:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-12-21 21:34:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:34:02,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:02,209 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:02,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:02,423 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:02,425 INFO L82 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2020-12-21 21:34:02,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:02,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025672058] [2020-12-21 21:34:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:34:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025672058] [2020-12-21 21:34:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090320068] [2020-12-21 21:34:02,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:03,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:34:03,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:03,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:34:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:34:03,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:03,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:34:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130205342] [2020-12-21 21:34:03,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:34:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:03,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:34:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:03,549 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2020-12-21 21:34:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:03,678 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2020-12-21 21:34:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:34:03,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-12-21 21:34:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:03,680 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:34:03,680 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:34:03,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:34:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-21 21:34:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:34:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-12-21 21:34:03,689 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2020-12-21 21:34:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:03,689 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-12-21 21:34:03,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:34:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-12-21 21:34:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:34:03,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:03,691 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:03,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:34:03,905 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2020-12-21 21:34:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:03,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611237213] [2020-12-21 21:34:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:34:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611237213] [2020-12-21 21:34:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114930497] [2020-12-21 21:34:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:04,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:34:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:04,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:34:04,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:34:04,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:04,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:34:04,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038099183] [2020-12-21 21:34:04,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:34:04,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:04,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:34:04,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:04,761 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-12-21 21:34:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:04,887 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2020-12-21 21:34:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:34:04,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-12-21 21:34:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:04,889 INFO L225 Difference]: With dead ends: 109 [2020-12-21 21:34:04,889 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:34:04,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:34:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-21 21:34:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:34:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-21 21:34:04,897 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2020-12-21 21:34:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:04,897 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-21 21:34:04,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:34:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-21 21:34:04,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:34:04,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:04,899 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:05,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:05,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:05,116 INFO L82 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2020-12-21 21:34:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:05,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670725237] [2020-12-21 21:34:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:34:05,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670725237] [2020-12-21 21:34:05,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540980987] [2020-12-21 21:34:05,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:34:05,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:34:05,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:05,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:34:05,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346013374] [2020-12-21 21:34:05,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:34:05,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:34:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:05,468 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-21 21:34:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:05,603 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-12-21 21:34:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:34:05,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-12-21 21:34:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:05,605 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:34:05,605 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:34:05,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:34:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-21 21:34:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:34:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-12-21 21:34:05,614 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2020-12-21 21:34:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:05,614 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-12-21 21:34:05,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:34:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-12-21 21:34:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:34:05,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:05,616 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:05,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:05,830 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:05,831 INFO L82 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2020-12-21 21:34:05,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:05,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726097523] [2020-12-21 21:34:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-21 21:34:06,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726097523] [2020-12-21 21:34:06,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782633812] [2020-12-21 21:34:06,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:06,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:34:06,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-21 21:34:06,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:06,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:34:06,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075584489] [2020-12-21 21:34:06,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:34:06,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:34:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:06,262 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2020-12-21 21:34:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:06,423 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2020-12-21 21:34:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:34:06,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-12-21 21:34:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:06,424 INFO L225 Difference]: With dead ends: 131 [2020-12-21 21:34:06,425 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 21:34:06,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 21:34:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-21 21:34:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:34:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-12-21 21:34:06,434 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2020-12-21 21:34:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:06,434 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-12-21 21:34:06,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:34:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-12-21 21:34:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:34:06,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:06,436 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:06,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:34:06,649 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2020-12-21 21:34:06,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:06,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458524995] [2020-12-21 21:34:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:34:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458524995] [2020-12-21 21:34:06,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101713575] [2020-12-21 21:34:06,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:14,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:34:14,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:14,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:34:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:34:14,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:14,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:34:14,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269861406] [2020-12-21 21:34:14,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:34:14,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:34:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:14,395 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 13 states. [2020-12-21 21:34:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:14,538 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2020-12-21 21:34:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:34:14,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-12-21 21:34:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:14,542 INFO L225 Difference]: With dead ends: 142 [2020-12-21 21:34:14,543 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:34:14,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:34:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-21 21:34:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:34:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-12-21 21:34:14,572 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2020-12-21 21:34:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:14,572 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-12-21 21:34:14,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:34:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-12-21 21:34:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:34:14,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:14,574 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:14,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:14,780 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2020-12-21 21:34:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:14,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548921194] [2020-12-21 21:34:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-21 21:34:14,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548921194] [2020-12-21 21:34:14,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490561201] [2020-12-21 21:34:14,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:15,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:34:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-21 21:34:15,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:15,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:34:15,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247504849] [2020-12-21 21:34:15,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:34:15,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:15,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:34:15,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:15,163 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2020-12-21 21:34:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:15,329 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2020-12-21 21:34:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:34:15,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-12-21 21:34:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:15,331 INFO L225 Difference]: With dead ends: 153 [2020-12-21 21:34:15,331 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:34:15,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:34:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-21 21:34:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:34:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-12-21 21:34:15,339 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2020-12-21 21:34:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:15,339 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-12-21 21:34:15,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:34:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-12-21 21:34:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:34:15,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:15,340 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:15,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:15,556 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2020-12-21 21:34:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:15,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255634767] [2020-12-21 21:34:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:34:15,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255634767] [2020-12-21 21:34:15,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343368915] [2020-12-21 21:34:15,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true