/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 18:59:18,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 18:59:18,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 18:59:18,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 18:59:18,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 18:59:18,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 18:59:18,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 18:59:18,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 18:59:18,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 18:59:18,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 18:59:18,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 18:59:18,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 18:59:18,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 18:59:18,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 18:59:18,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 18:59:18,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 18:59:18,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 18:59:18,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 18:59:18,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 18:59:18,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 18:59:18,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 18:59:18,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 18:59:18,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 18:59:18,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 18:59:18,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 18:59:18,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 18:59:18,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 18:59:18,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 18:59:18,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 18:59:18,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 18:59:18,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 18:59:18,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 18:59:18,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 18:59:18,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 18:59:18,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 18:59:18,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 18:59:18,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 18:59:18,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 18:59:18,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 18:59:18,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 18:59:18,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 18:59:18,917 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 18:59:18,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 18:59:18,918 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 18:59:18,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 18:59:18,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 18:59:18,919 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 18:59:18,921 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 18:59:18,921 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 18:59:18,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 18:59:18,922 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 18:59:18,922 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 18:59:18,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 18:59:18,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 18:59:18,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 18:59:18,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:59:18,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 18:59:18,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 18:59:18,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 18:59:18,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 18:59:18,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 18:59:18,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 18:59:19,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 18:59:19,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 18:59:19,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 18:59:19,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 18:59:19,510 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 18:59:19,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2020-12-22 18:59:19,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0237e4ca/4d652e504dbf4915853047b759be84df/FLAGb5c79215b [2020-12-22 18:59:20,319 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 18:59:20,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2020-12-22 18:59:20,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0237e4ca/4d652e504dbf4915853047b759be84df/FLAGb5c79215b [2020-12-22 18:59:20,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0237e4ca/4d652e504dbf4915853047b759be84df [2020-12-22 18:59:20,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 18:59:20,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 18:59:20,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 18:59:20,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 18:59:20,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 18:59:20,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:59:20" (1/1) ... [2020-12-22 18:59:20,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b2b2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:20, skipping insertion in model container [2020-12-22 18:59:20,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:59:20" (1/1) ... [2020-12-22 18:59:20,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 18:59:20,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 18:59:21,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:59:21,157 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 18:59:21,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:59:21,292 INFO L208 MainTranslator]: Completed translation [2020-12-22 18:59:21,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21 WrapperNode [2020-12-22 18:59:21,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 18:59:21,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 18:59:21,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 18:59:21,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 18:59:21,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 18:59:21,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 18:59:21,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 18:59:21,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 18:59:21,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (1/1) ... [2020-12-22 18:59:21,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 18:59:21,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 18:59:21,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 18:59:21,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 18:59:21,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (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 [2020-12-22 18:59:21,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 18:59:21,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 18:59:21,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 18:59:21,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 18:59:21,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 18:59:21,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 18:59:22,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 18:59:22,223 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 18:59:22,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:59:22 BoogieIcfgContainer [2020-12-22 18:59:22,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 18:59:22,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 18:59:22,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 18:59:22,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 18:59:22,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:59:20" (1/3) ... [2020-12-22 18:59:22,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1c372f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:59:22, skipping insertion in model container [2020-12-22 18:59:22,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:59:21" (2/3) ... [2020-12-22 18:59:22,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1c372f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:59:22, skipping insertion in model container [2020-12-22 18:59:22,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:59:22" (3/3) ... [2020-12-22 18:59:22,245 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2020-12-22 18:59:22,255 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 18:59:22,261 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2020-12-22 18:59:22,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2020-12-22 18:59:22,316 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 18:59:22,316 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 18:59:22,317 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 18:59:22,317 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 18:59:22,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 18:59:22,317 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 18:59:22,317 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 18:59:22,318 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 18:59:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-12-22 18:59:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:59:22,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:22,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:22,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2020-12-22 18:59:22,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:22,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761892448] [2020-12-22 18:59:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761892448] [2020-12-22 18:59:22,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:22,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:59:22,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328389962] [2020-12-22 18:59:22,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:59:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:59:22,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:22,669 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-12-22 18:59:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:22,944 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2020-12-22 18:59:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:59:22,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 18:59:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:22,961 INFO L225 Difference]: With dead ends: 127 [2020-12-22 18:59:22,961 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 18:59:22,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:59:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 18:59:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2020-12-22 18:59:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 18:59:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-22 18:59:23,028 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2020-12-22 18:59:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:23,028 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-22 18:59:23,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:59:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-22 18:59:23,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:59:23,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:23,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:23,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 18:59:23,033 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:23,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2020-12-22 18:59:23,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:23,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682611621] [2020-12-22 18:59:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:23,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682611621] [2020-12-22 18:59:23,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:23,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:59:23,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642437000] [2020-12-22 18:59:23,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:59:23,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:59:23,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:59:23,142 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 3 states. [2020-12-22 18:59:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:23,243 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-12-22 18:59:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:59:23,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 18:59:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:23,250 INFO L225 Difference]: With dead ends: 47 [2020-12-22 18:59:23,250 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 18:59:23,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:59:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 18:59:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-22 18:59:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 18:59:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-12-22 18:59:23,276 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2020-12-22 18:59:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:23,277 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-12-22 18:59:23,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:59:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-12-22 18:59:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:59:23,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:23,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:23,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 18:59:23,280 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:23,283 INFO L82 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2020-12-22 18:59:23,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:23,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345174460] [2020-12-22 18:59:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:23,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345174460] [2020-12-22 18:59:23,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:23,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:59:23,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860787250] [2020-12-22 18:59:23,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:23,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:23,439 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-12-22 18:59:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:23,514 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-12-22 18:59:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:23,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 18:59:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:23,520 INFO L225 Difference]: With dead ends: 78 [2020-12-22 18:59:23,521 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 18:59:23,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 18:59:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2020-12-22 18:59:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 18:59:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-22 18:59:23,541 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2020-12-22 18:59:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:23,543 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-22 18:59:23,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-22 18:59:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:59:23,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:23,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:23,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 18:59:23,551 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2020-12-22 18:59:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:23,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264249559] [2020-12-22 18:59:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:23,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264249559] [2020-12-22 18:59:23,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:23,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:59:23,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185267654] [2020-12-22 18:59:23,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:59:23,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:59:23,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:23,688 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-12-22 18:59:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:23,875 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-12-22 18:59:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:59:23,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 18:59:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:23,879 INFO L225 Difference]: With dead ends: 84 [2020-12-22 18:59:23,879 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 18:59:23,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:59:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 18:59:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2020-12-22 18:59:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 18:59:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-22 18:59:23,893 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2020-12-22 18:59:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:23,894 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-22 18:59:23,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:59:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-22 18:59:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:59:23,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:23,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:23,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 18:59:23,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:23,912 INFO L82 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2020-12-22 18:59:23,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:23,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214681187] [2020-12-22 18:59:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:23,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214681187] [2020-12-22 18:59:23,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:23,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:59:23,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319341570] [2020-12-22 18:59:23,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:59:23,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:23,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:59:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:59:23,996 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 3 states. [2020-12-22 18:59:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:24,036 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-12-22 18:59:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:59:24,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 18:59:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:24,038 INFO L225 Difference]: With dead ends: 45 [2020-12-22 18:59:24,038 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 18:59:24,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:59:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 18:59:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 18:59:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 18:59:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-12-22 18:59:24,045 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2020-12-22 18:59:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:24,046 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-12-22 18:59:24,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:59:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-12-22 18:59:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:59:24,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:24,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:24,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 18:59:24,048 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:24,048 INFO L82 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2020-12-22 18:59:24,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:24,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703206125] [2020-12-22 18:59:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:24,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703206125] [2020-12-22 18:59:24,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:24,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:59:24,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342612142] [2020-12-22 18:59:24,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:24,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:24,138 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states. [2020-12-22 18:59:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:24,224 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-12-22 18:59:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:24,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 18:59:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:24,226 INFO L225 Difference]: With dead ends: 79 [2020-12-22 18:59:24,226 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 18:59:24,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 18:59:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2020-12-22 18:59:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 18:59:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-12-22 18:59:24,231 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2020-12-22 18:59:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:24,232 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-12-22 18:59:24,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-12-22 18:59:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:59:24,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:24,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:24,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 18:59:24,233 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:24,234 INFO L82 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2020-12-22 18:59:24,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:24,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214893145] [2020-12-22 18:59:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:24,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214893145] [2020-12-22 18:59:24,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:24,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:59:24,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835535136] [2020-12-22 18:59:24,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:24,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:24,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:24,292 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 4 states. [2020-12-22 18:59:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:24,327 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-22 18:59:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:24,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 18:59:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:24,329 INFO L225 Difference]: With dead ends: 46 [2020-12-22 18:59:24,329 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 18:59:24,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 18:59:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 18:59:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 18:59:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-22 18:59:24,333 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2020-12-22 18:59:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:24,334 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-22 18:59:24,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-22 18:59:24,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:59:24,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:24,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:24,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 18:59:24,336 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:24,336 INFO L82 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2020-12-22 18:59:24,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:24,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332838960] [2020-12-22 18:59:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:24,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332838960] [2020-12-22 18:59:24,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:24,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:59:24,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937373479] [2020-12-22 18:59:24,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:24,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:24,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:24,377 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 4 states. [2020-12-22 18:59:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:24,397 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-12-22 18:59:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:24,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 18:59:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:24,399 INFO L225 Difference]: With dead ends: 80 [2020-12-22 18:59:24,399 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 18:59:24,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 18:59:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-12-22 18:59:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 18:59:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-12-22 18:59:24,404 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 10 [2020-12-22 18:59:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:24,405 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-12-22 18:59:24,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-12-22 18:59:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:59:24,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:24,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:24,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 18:59:24,406 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2020-12-22 18:59:24,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:24,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839366791] [2020-12-22 18:59:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:24,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839366791] [2020-12-22 18:59:24,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:24,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:59:24,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923717993] [2020-12-22 18:59:24,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:59:24,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:24,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:59:24,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:59:24,437 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 3 states. [2020-12-22 18:59:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:24,465 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-12-22 18:59:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:59:24,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 18:59:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:24,466 INFO L225 Difference]: With dead ends: 55 [2020-12-22 18:59:24,466 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 18:59:24,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:59:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 18:59:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 18:59:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 18:59:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-12-22 18:59:24,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2020-12-22 18:59:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:24,471 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-12-22 18:59:24,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:59:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-12-22 18:59:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:59:24,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:24,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:24,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 18:59:24,473 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:24,474 INFO L82 PathProgramCache]: Analyzing trace with hash 747838366, now seen corresponding path program 1 times [2020-12-22 18:59:24,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:24,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729160990] [2020-12-22 18:59:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:24,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729160990] [2020-12-22 18:59:24,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:24,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 18:59:24,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705243518] [2020-12-22 18:59:24,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:59:24,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:24,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:59:24,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:59:24,529 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 6 states. [2020-12-22 18:59:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:24,646 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2020-12-22 18:59:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 18:59:24,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 18:59:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:24,655 INFO L225 Difference]: With dead ends: 107 [2020-12-22 18:59:24,655 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 18:59:24,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-22 18:59:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 18:59:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2020-12-22 18:59:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 18:59:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-12-22 18:59:24,662 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2020-12-22 18:59:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:24,662 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-12-22 18:59:24,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:59:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-12-22 18:59:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:59:24,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:24,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:24,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 18:59:24,664 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2020-12-22 18:59:24,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:24,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239540762] [2020-12-22 18:59:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:24,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239540762] [2020-12-22 18:59:24,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:24,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:59:24,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950514320] [2020-12-22 18:59:24,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:59:24,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:24,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:59:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:59:24,773 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 6 states. [2020-12-22 18:59:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:24,960 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-12-22 18:59:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:59:24,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 18:59:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:24,962 INFO L225 Difference]: With dead ends: 81 [2020-12-22 18:59:24,963 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 18:59:24,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:59:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 18:59:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-12-22 18:59:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 18:59:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-12-22 18:59:24,967 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 10 [2020-12-22 18:59:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:24,968 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-12-22 18:59:24,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:59:24,968 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-12-22 18:59:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 18:59:24,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:24,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:24,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 18:59:24,970 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:24,971 INFO L82 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2020-12-22 18:59:24,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:24,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153399469] [2020-12-22 18:59:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:25,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153399469] [2020-12-22 18:59:25,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:25,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:59:25,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576223022] [2020-12-22 18:59:25,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:59:25,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:25,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:59:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:25,035 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-12-22 18:59:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:25,137 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-12-22 18:59:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:59:25,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 18:59:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:25,138 INFO L225 Difference]: With dead ends: 83 [2020-12-22 18:59:25,138 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 18:59:25,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:59:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 18:59:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-12-22 18:59:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 18:59:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-12-22 18:59:25,143 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 11 [2020-12-22 18:59:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:25,143 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-12-22 18:59:25,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:59:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-12-22 18:59:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 18:59:25,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:25,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:25,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 18:59:25,145 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2020-12-22 18:59:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:25,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323947671] [2020-12-22 18:59:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323947671] [2020-12-22 18:59:25,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:25,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:59:25,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849433417] [2020-12-22 18:59:25,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:59:25,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:59:25,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:25,201 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 5 states. [2020-12-22 18:59:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:25,257 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2020-12-22 18:59:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:59:25,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 18:59:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:25,259 INFO L225 Difference]: With dead ends: 63 [2020-12-22 18:59:25,259 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 18:59:25,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:59:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 18:59:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-12-22 18:59:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 18:59:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-12-22 18:59:25,263 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 11 [2020-12-22 18:59:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:25,263 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-12-22 18:59:25,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:59:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-12-22 18:59:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 18:59:25,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:25,264 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:25,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 18:59:25,265 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2020-12-22 18:59:25,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:25,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636236145] [2020-12-22 18:59:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636236145] [2020-12-22 18:59:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459456658] [2020-12-22 18:59:25,331 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 [2020-12-22 18:59:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 18:59:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:25,501 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_18|], 1=[|v_#valid_26|]} [2020-12-22 18:59:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:25,527 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:59:25,529 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:25,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:25,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:59:25,567 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:25,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:25,588 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:25,589 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:59:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:25,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:25,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 18:59:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815530483] [2020-12-22 18:59:25,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:59:25,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:25,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:59:25,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:59:25,675 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 6 states. [2020-12-22 18:59:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:25,814 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-12-22 18:59:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:59:25,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 18:59:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:25,816 INFO L225 Difference]: With dead ends: 90 [2020-12-22 18:59:25,816 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 18:59:25,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:59:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 18:59:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2020-12-22 18:59:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 18:59:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-22 18:59:25,820 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 12 [2020-12-22 18:59:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:25,821 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-22 18:59:25,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:59:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-22 18:59:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 18:59:25,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:25,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:26,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 18:59:26,036 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2020-12-22 18:59:26,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:26,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104632200] [2020-12-22 18:59:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:26,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104632200] [2020-12-22 18:59:26,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:26,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:59:26,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737080671] [2020-12-22 18:59:26,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:26,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:26,117 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 4 states. [2020-12-22 18:59:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:26,167 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-12-22 18:59:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:26,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-22 18:59:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:26,170 INFO L225 Difference]: With dead ends: 51 [2020-12-22 18:59:26,170 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 18:59:26,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 18:59:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 18:59:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 18:59:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-12-22 18:59:26,177 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 13 [2020-12-22 18:59:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:26,179 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-12-22 18:59:26,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-12-22 18:59:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 18:59:26,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:26,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:26,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 18:59:26,181 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2020-12-22 18:59:26,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:26,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112509255] [2020-12-22 18:59:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112509255] [2020-12-22 18:59:26,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:26,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:59:26,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823709367] [2020-12-22 18:59:26,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:59:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:59:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:59:26,271 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 6 states. [2020-12-22 18:59:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:26,351 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-12-22 18:59:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:59:26,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 18:59:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:26,352 INFO L225 Difference]: With dead ends: 55 [2020-12-22 18:59:26,353 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 18:59:26,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:59:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 18:59:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-22 18:59:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 18:59:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-22 18:59:26,360 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 13 [2020-12-22 18:59:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:26,360 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-22 18:59:26,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:59:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-22 18:59:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 18:59:26,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:26,363 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:26,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 18:59:26,363 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2020-12-22 18:59:26,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:26,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454290118] [2020-12-22 18:59:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:26,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454290118] [2020-12-22 18:59:26,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48452639] [2020-12-22 18:59:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 18:59:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:26,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 18:59:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:26,598 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:26,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:59:26,603 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:26,635 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 18:59:26,644 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:26,644 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 18:59:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:26,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:26,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 18:59:26,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015155203] [2020-12-22 18:59:26,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 18:59:26,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:26,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 18:59:26,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:59:26,705 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 8 states. [2020-12-22 18:59:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:26,885 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-12-22 18:59:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 18:59:26,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 18:59:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:26,886 INFO L225 Difference]: With dead ends: 73 [2020-12-22 18:59:26,886 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 18:59:26,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:59:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 18:59:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2020-12-22 18:59:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 18:59:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-22 18:59:26,890 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2020-12-22 18:59:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:26,890 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-22 18:59:26,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 18:59:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-22 18:59:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:59:26,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:26,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:27,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 18:59:27,105 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2020-12-22 18:59:27,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:27,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492855247] [2020-12-22 18:59:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:27,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492855247] [2020-12-22 18:59:27,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:27,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:59:27,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129853946] [2020-12-22 18:59:27,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:59:27,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:59:27,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:27,144 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-12-22 18:59:27,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:27,217 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-12-22 18:59:27,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:59:27,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-22 18:59:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:27,219 INFO L225 Difference]: With dead ends: 48 [2020-12-22 18:59:27,219 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 18:59:27,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:59:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 18:59:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 18:59:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 18:59:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-22 18:59:27,225 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2020-12-22 18:59:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:27,225 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-22 18:59:27,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:59:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-22 18:59:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:59:27,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:27,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:27,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 18:59:27,229 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2020-12-22 18:59:27,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:27,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924575535] [2020-12-22 18:59:27,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:27,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924575535] [2020-12-22 18:59:27,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:27,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 18:59:27,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360476505] [2020-12-22 18:59:27,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 18:59:27,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:27,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 18:59:27,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:59:27,349 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 7 states. [2020-12-22 18:59:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:27,450 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-12-22 18:59:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:59:27,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 18:59:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:27,451 INFO L225 Difference]: With dead ends: 54 [2020-12-22 18:59:27,451 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 18:59:27,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:59:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 18:59:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-22 18:59:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 18:59:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-22 18:59:27,454 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2020-12-22 18:59:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:27,454 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-22 18:59:27,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 18:59:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-22 18:59:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:59:27,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:27,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:27,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 18:59:27,456 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:27,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:27,456 INFO L82 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2020-12-22 18:59:27,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:27,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439317366] [2020-12-22 18:59:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:27,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439317366] [2020-12-22 18:59:27,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729196208] [2020-12-22 18:59:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 18:59:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 18:59:27,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:27,644 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:27,645 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:59:27,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:27,674 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-22 18:59:27,679 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:27,679 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:16, output treesize:9 [2020-12-22 18:59:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:27,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:27,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-12-22 18:59:27,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47132179] [2020-12-22 18:59:27,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 18:59:27,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 18:59:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:59:27,759 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 9 states. [2020-12-22 18:59:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:27,875 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-12-22 18:59:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:59:27,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 18:59:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:27,877 INFO L225 Difference]: With dead ends: 67 [2020-12-22 18:59:27,877 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 18:59:27,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:59:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 18:59:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2020-12-22 18:59:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 18:59:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-12-22 18:59:27,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 16 [2020-12-22 18:59:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:27,881 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-12-22 18:59:27,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 18:59:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-12-22 18:59:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 18:59:27,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:27,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:28,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:28,096 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2020-12-22 18:59:28,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:28,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967420662] [2020-12-22 18:59:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:28,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967420662] [2020-12-22 18:59:28,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:28,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:59:28,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791420184] [2020-12-22 18:59:28,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:28,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:28,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:28,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:28,128 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 4 states. [2020-12-22 18:59:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:28,174 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-12-22 18:59:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:28,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 18:59:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:28,176 INFO L225 Difference]: With dead ends: 52 [2020-12-22 18:59:28,176 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 18:59:28,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:59:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 18:59:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 18:59:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 18:59:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-22 18:59:28,179 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 17 [2020-12-22 18:59:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:28,179 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-22 18:59:28,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-22 18:59:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 18:59:28,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:28,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:28,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 18:59:28,180 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2020-12-22 18:59:28,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:28,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119699536] [2020-12-22 18:59:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:28,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119699536] [2020-12-22 18:59:28,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:28,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:59:28,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9389994] [2020-12-22 18:59:28,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:59:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:28,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:59:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:59:28,243 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 6 states. [2020-12-22 18:59:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:28,356 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-12-22 18:59:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:59:28,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-22 18:59:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:28,357 INFO L225 Difference]: With dead ends: 56 [2020-12-22 18:59:28,357 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 18:59:28,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:59:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 18:59:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 18:59:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 18:59:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-12-22 18:59:28,360 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 17 [2020-12-22 18:59:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:28,361 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-12-22 18:59:28,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:59:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-12-22 18:59:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 18:59:28,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:28,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:28,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 18:59:28,362 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash 337162109, now seen corresponding path program 2 times [2020-12-22 18:59:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:28,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917206562] [2020-12-22 18:59:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 18:59:28,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917206562] [2020-12-22 18:59:28,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:28,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 18:59:28,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208999133] [2020-12-22 18:59:28,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 18:59:28,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 18:59:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:59:28,494 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 7 states. [2020-12-22 18:59:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:28,614 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-12-22 18:59:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 18:59:28,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 18:59:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:28,615 INFO L225 Difference]: With dead ends: 77 [2020-12-22 18:59:28,615 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 18:59:28,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:59:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 18:59:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2020-12-22 18:59:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 18:59:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-12-22 18:59:28,618 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 19 [2020-12-22 18:59:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:28,618 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-12-22 18:59:28,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 18:59:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-12-22 18:59:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 18:59:28,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:28,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:28,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 18:59:28,620 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 1 times [2020-12-22 18:59:28,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:28,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856673290] [2020-12-22 18:59:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 18:59:28,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856673290] [2020-12-22 18:59:28,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:28,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 18:59:28,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291592047] [2020-12-22 18:59:28,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 18:59:28,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:28,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 18:59:28,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:59:28,737 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 9 states. [2020-12-22 18:59:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:28,985 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-12-22 18:59:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:59:28,985 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-22 18:59:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:28,986 INFO L225 Difference]: With dead ends: 91 [2020-12-22 18:59:28,986 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 18:59:28,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 18:59:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 18:59:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2020-12-22 18:59:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 18:59:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-12-22 18:59:28,990 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2020-12-22 18:59:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:28,990 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-12-22 18:59:28,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 18:59:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-12-22 18:59:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 18:59:28,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:28,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:28,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 18:59:28,991 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2020-12-22 18:59:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:28,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890418400] [2020-12-22 18:59:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 18:59:29,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890418400] [2020-12-22 18:59:29,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:29,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 18:59:29,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992740046] [2020-12-22 18:59:29,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 18:59:29,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:29,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 18:59:29,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:59:29,203 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 9 states. [2020-12-22 18:59:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:29,352 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-12-22 18:59:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:59:29,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-22 18:59:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:29,355 INFO L225 Difference]: With dead ends: 82 [2020-12-22 18:59:29,355 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 18:59:29,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:59:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 18:59:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2020-12-22 18:59:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 18:59:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-12-22 18:59:29,359 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2020-12-22 18:59:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:29,359 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-12-22 18:59:29,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 18:59:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-12-22 18:59:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 18:59:29,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:29,360 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:29,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 18:59:29,360 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2020-12-22 18:59:29,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:29,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547517498] [2020-12-22 18:59:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:29,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547517498] [2020-12-22 18:59:29,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:29,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 18:59:29,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40014738] [2020-12-22 18:59:29,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 18:59:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 18:59:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:59:29,502 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 8 states. [2020-12-22 18:59:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:29,692 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-12-22 18:59:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 18:59:29,693 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-22 18:59:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:29,694 INFO L225 Difference]: With dead ends: 100 [2020-12-22 18:59:29,694 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 18:59:29,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:59:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 18:59:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-12-22 18:59:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 18:59:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-12-22 18:59:29,698 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 20 [2020-12-22 18:59:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:29,699 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-12-22 18:59:29,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 18:59:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-12-22 18:59:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 18:59:29,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:29,700 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:29,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 18:59:29,700 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:29,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2020-12-22 18:59:29,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:29,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018372828] [2020-12-22 18:59:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:29,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018372828] [2020-12-22 18:59:29,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:29,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 18:59:29,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412917267] [2020-12-22 18:59:29,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 18:59:29,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 18:59:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:59:29,877 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 10 states. [2020-12-22 18:59:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:30,136 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2020-12-22 18:59:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:59:30,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 18:59:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:30,138 INFO L225 Difference]: With dead ends: 122 [2020-12-22 18:59:30,138 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 18:59:30,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:59:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 18:59:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2020-12-22 18:59:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 18:59:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-12-22 18:59:30,146 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 20 [2020-12-22 18:59:30,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:30,147 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-12-22 18:59:30,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 18:59:30,147 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-12-22 18:59:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 18:59:30,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:30,147 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:30,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 18:59:30,148 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2020-12-22 18:59:30,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:30,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469952743] [2020-12-22 18:59:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:30,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469952743] [2020-12-22 18:59:30,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:30,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 18:59:30,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912466702] [2020-12-22 18:59:30,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 18:59:30,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:30,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 18:59:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:59:30,365 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 9 states. [2020-12-22 18:59:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:30,560 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2020-12-22 18:59:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:59:30,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-22 18:59:30,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:30,561 INFO L225 Difference]: With dead ends: 135 [2020-12-22 18:59:30,562 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 18:59:30,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 18:59:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 18:59:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2020-12-22 18:59:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 18:59:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-12-22 18:59:30,566 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 20 [2020-12-22 18:59:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:30,566 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-12-22 18:59:30,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 18:59:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-12-22 18:59:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 18:59:30,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:30,567 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] [2020-12-22 18:59:30,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 18:59:30,567 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:30,568 INFO L82 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2020-12-22 18:59:30,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:30,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924291232] [2020-12-22 18:59:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:30,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924291232] [2020-12-22 18:59:30,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:59:30,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:59:30,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744527725] [2020-12-22 18:59:30,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:30,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:30,615 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 4 states. [2020-12-22 18:59:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:30,639 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-12-22 18:59:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:30,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-22 18:59:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:30,641 INFO L225 Difference]: With dead ends: 92 [2020-12-22 18:59:30,641 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 18:59:30,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:59:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 18:59:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 18:59:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 18:59:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-12-22 18:59:30,644 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 21 [2020-12-22 18:59:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:30,644 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-12-22 18:59:30,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-12-22 18:59:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 18:59:30,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:30,645 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:30,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 18:59:30,645 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2020-12-22 18:59:30,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:30,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041426030] [2020-12-22 18:59:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041426030] [2020-12-22 18:59:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370839010] [2020-12-22 18:59:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 18:59:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:30,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 18:59:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:30,888 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:30,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:59:30,891 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:30,914 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 18:59:30,924 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:30,924 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 18:59:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:31,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:31,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 18:59:31,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687372130] [2020-12-22 18:59:31,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 18:59:31,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 18:59:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:59:31,096 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 16 states. [2020-12-22 18:59:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:31,568 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2020-12-22 18:59:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:59:31,570 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-12-22 18:59:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:31,571 INFO L225 Difference]: With dead ends: 115 [2020-12-22 18:59:31,571 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 18:59:31,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:59:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 18:59:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-12-22 18:59:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 18:59:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-12-22 18:59:31,578 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 23 [2020-12-22 18:59:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:31,579 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-12-22 18:59:31,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 18:59:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-12-22 18:59:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 18:59:31,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:31,580 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:31,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:31,794 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2020-12-22 18:59:31,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:31,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851547100] [2020-12-22 18:59:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:31,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851547100] [2020-12-22 18:59:31,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364449276] [2020-12-22 18:59:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 18:59:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 18:59:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:32,034 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:32,034 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:59:32,036 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:32,061 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 18:59:32,078 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:32,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 18:59:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:32,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:32,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 18:59:32,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683890396] [2020-12-22 18:59:32,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 18:59:32,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:32,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 18:59:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:59:32,257 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 16 states. [2020-12-22 18:59:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:32,730 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2020-12-22 18:59:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:59:32,731 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-12-22 18:59:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:32,732 INFO L225 Difference]: With dead ends: 107 [2020-12-22 18:59:32,732 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 18:59:32,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:59:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 18:59:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2020-12-22 18:59:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 18:59:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2020-12-22 18:59:32,738 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 24 [2020-12-22 18:59:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:32,740 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2020-12-22 18:59:32,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 18:59:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2020-12-22 18:59:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 18:59:32,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:32,742 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:32,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 18:59:32,957 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2020-12-22 18:59:32,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:32,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286364851] [2020-12-22 18:59:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:33,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286364851] [2020-12-22 18:59:33,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606091066] [2020-12-22 18:59:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 18:59:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 18:59:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:33,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:33,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-12-22 18:59:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405323941] [2020-12-22 18:59:33,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 18:59:33,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 18:59:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-22 18:59:33,304 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 15 states. [2020-12-22 18:59:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:33,746 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-12-22 18:59:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:59:33,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-12-22 18:59:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:33,748 INFO L225 Difference]: With dead ends: 104 [2020-12-22 18:59:33,748 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 18:59:33,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-12-22 18:59:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 18:59:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-12-22 18:59:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 18:59:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2020-12-22 18:59:33,753 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 24 [2020-12-22 18:59:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:33,753 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2020-12-22 18:59:33,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 18:59:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2020-12-22 18:59:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 18:59:33,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:33,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:33,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:33,966 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -249399040, now seen corresponding path program 1 times [2020-12-22 18:59:33,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:33,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644620052] [2020-12-22 18:59:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:34,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644620052] [2020-12-22 18:59:34,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817484487] [2020-12-22 18:59:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-22 18:59:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 18:59:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:34,231 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:34,231 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:59:34,233 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:34,259 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 18:59:34,262 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:34,262 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 18:59:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:34,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:34,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-22 18:59:34,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79615816] [2020-12-22 18:59:34,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 18:59:34,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:34,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 18:59:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:59:34,449 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand 16 states. [2020-12-22 18:59:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:35,035 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-12-22 18:59:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:59:35,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-12-22 18:59:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:35,037 INFO L225 Difference]: With dead ends: 109 [2020-12-22 18:59:35,037 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 18:59:35,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:59:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 18:59:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-12-22 18:59:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 18:59:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2020-12-22 18:59:35,044 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 25 [2020-12-22 18:59:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:35,045 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2020-12-22 18:59:35,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 18:59:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2020-12-22 18:59:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 18:59:35,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:35,046 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:35,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:35,251 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1394123375, now seen corresponding path program 2 times [2020-12-22 18:59:35,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:35,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658095073] [2020-12-22 18:59:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 18:59:35,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658095073] [2020-12-22 18:59:35,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089808010] [2020-12-22 18:59:35,692 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 [2020-12-22 18:59:35,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:59:35,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 18:59:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:35,893 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:59:35,895 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:35,905 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:35,908 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:59:35,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 18:59:36,070 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 18:59:36,071 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:36,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:36,074 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:36,074 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-22 18:59:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 18:59:36,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:36,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2020-12-22 18:59:36,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369700225] [2020-12-22 18:59:36,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 18:59:36,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:36,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 18:59:36,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-12-22 18:59:36,084 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand 21 states. [2020-12-22 18:59:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:37,132 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2020-12-22 18:59:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 18:59:37,133 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 18:59:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:37,134 INFO L225 Difference]: With dead ends: 193 [2020-12-22 18:59:37,134 INFO L226 Difference]: Without dead ends: 177 [2020-12-22 18:59:37,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 18:59:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-22 18:59:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 108. [2020-12-22 18:59:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 18:59:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-12-22 18:59:37,140 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 26 [2020-12-22 18:59:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:37,140 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-12-22 18:59:37,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 18:59:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-12-22 18:59:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 18:59:37,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:37,141 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:37,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 18:59:37,356 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:37,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2020-12-22 18:59:37,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:37,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377882529] [2020-12-22 18:59:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:37,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377882529] [2020-12-22 18:59:37,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338665983] [2020-12-22 18:59:37,686 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 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 [2020-12-22 18:59:37,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:59:37,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:37,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 18:59:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:37,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:59:37,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:37,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:37,930 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:59:37,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-22 18:59:37,989 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:37,990 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-22 18:59:37,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:38,023 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-22 18:59:38,027 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 18:59:38,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 18:59:38,417 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-12-22 18:59:38,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:38,716 INFO L348 Elim1Store]: treesize reduction 20, result has 80.4 percent of original size [2020-12-22 18:59:38,717 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 98 [2020-12-22 18:59:38,727 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:38,792 INFO L625 ElimStorePlain]: treesize reduction 46, result has 53.1 percent of original size [2020-12-22 18:59:38,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:59:38,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:59:38,800 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:59:38,802 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:59:38,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 18:59:38,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:52 [2020-12-22 18:59:38,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:59:38,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:59:38,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:59:38,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:59:38,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:59:38,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 18:59:40,164 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-22 18:59:40,165 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:59:40,187 INFO L443 ElimStorePlain]: Different costs {7=[v_prenex_3], 15=[|#memory_int|]} [2020-12-22 18:59:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:59:40,196 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 14 [2020-12-22 18:59:40,198 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:40,254 INFO L625 ElimStorePlain]: treesize reduction 4, result has 94.1 percent of original size [2020-12-22 18:59:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:40,262 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:59:40,320 INFO L348 Elim1Store]: treesize reduction 12, result has 79.3 percent of original size [2020-12-22 18:59:40,321 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 62 [2020-12-22 18:59:40,326 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-22 18:59:40,328 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 18:59:40,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:59:40,330 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:59:40,333 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:40,391 INFO L625 ElimStorePlain]: treesize reduction 15, result has 68.8 percent of original size [2020-12-22 18:59:40,397 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:40,398 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:100, output treesize:3 [2020-12-22 18:59:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:40,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:40,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2020-12-22 18:59:40,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586097935] [2020-12-22 18:59:40,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 18:59:40,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:40,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 18:59:40,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=636, Unknown=1, NotChecked=0, Total=702 [2020-12-22 18:59:40,412 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 27 states. [2020-12-22 18:59:41,221 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-22 18:59:43,839 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 18:59:46,460 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-12-22 18:59:48,998 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-12-22 18:59:49,177 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-12-22 18:59:49,470 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-12-22 18:59:52,978 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 18:59:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:55,791 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2020-12-22 18:59:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 18:59:55,791 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-22 18:59:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:55,795 INFO L225 Difference]: With dead ends: 183 [2020-12-22 18:59:55,795 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 18:59:55,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=329, Invalid=1920, Unknown=7, NotChecked=0, Total=2256 [2020-12-22 18:59:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 18:59:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2020-12-22 18:59:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 18:59:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2020-12-22 18:59:55,804 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 28 [2020-12-22 18:59:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:55,805 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2020-12-22 18:59:55,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 18:59:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2020-12-22 18:59:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 18:59:55,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:55,806 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:56,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:56,024 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 3 times [2020-12-22 18:59:56,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:56,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122310612] [2020-12-22 18:59:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:56,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122310612] [2020-12-22 18:59:56,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218390353] [2020-12-22 18:59:56,178 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 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 [2020-12-22 18:59:56,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 18:59:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 18:59:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:56,297 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:56,298 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:59:56,300 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:56,334 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 18:59:56,338 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:56,339 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 18:59:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:56,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:56,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-22 18:59:56,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968420970] [2020-12-22 18:59:56,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 18:59:56,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 18:59:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:59:56,613 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand 20 states. [2020-12-22 18:59:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:57,430 INFO L93 Difference]: Finished difference Result 235 states and 266 transitions. [2020-12-22 18:59:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 18:59:57,431 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-12-22 18:59:57,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:57,434 INFO L225 Difference]: With dead ends: 235 [2020-12-22 18:59:57,434 INFO L226 Difference]: Without dead ends: 235 [2020-12-22 18:59:57,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:59:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-22 18:59:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-12-22 18:59:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 18:59:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2020-12-22 18:59:57,443 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 30 [2020-12-22 18:59:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:57,444 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2020-12-22 18:59:57,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 18:59:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2020-12-22 18:59:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 18:59:57,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:57,444 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:57,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:57,660 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1644175301, now seen corresponding path program 2 times [2020-12-22 18:59:57,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:57,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068458710] [2020-12-22 18:59:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:57,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068458710] [2020-12-22 18:59:57,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425179635] [2020-12-22 18:59:57,810 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 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 [2020-12-22 18:59:57,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 18:59:57,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:57,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 18:59:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 18:59:57,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 18:59:57,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2020-12-22 18:59:57,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409993683] [2020-12-22 18:59:57,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:59:57,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:59:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-12-22 18:59:57,977 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand 4 states. [2020-12-22 18:59:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:58,020 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2020-12-22 18:59:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:59:58,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-12-22 18:59:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:58,022 INFO L225 Difference]: With dead ends: 166 [2020-12-22 18:59:58,022 INFO L226 Difference]: Without dead ends: 163 [2020-12-22 18:59:58,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-12-22 18:59:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-22 18:59:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-12-22 18:59:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 18:59:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2020-12-22 18:59:58,027 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 31 [2020-12-22 18:59:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:58,027 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2020-12-22 18:59:58,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:59:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2020-12-22 18:59:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 18:59:58,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:58,028 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:58,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 18:59:58,242 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2020-12-22 18:59:58,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:58,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772029444] [2020-12-22 18:59:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:58,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772029444] [2020-12-22 18:59:58,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333711754] [2020-12-22 18:59:58,434 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 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 [2020-12-22 18:59:58,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 18:59:58,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 18:59:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:58,572 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_27|]} [2020-12-22 18:59:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:58,583 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:59:58,587 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:58,597 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:58,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:59:58,605 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:58,615 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:58,620 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:58,620 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:59:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:58,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:58,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2020-12-22 18:59:58,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177803712] [2020-12-22 18:59:58,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 18:59:58,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:58,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 18:59:58,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-22 18:59:58,879 INFO L87 Difference]: Start difference. First operand 157 states and 179 transitions. Second operand 19 states. [2020-12-22 18:59:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:59,517 INFO L93 Difference]: Finished difference Result 168 states and 187 transitions. [2020-12-22 18:59:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:59:59,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-22 18:59:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:59,518 INFO L225 Difference]: With dead ends: 168 [2020-12-22 18:59:59,518 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 18:59:59,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-12-22 18:59:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 18:59:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2020-12-22 18:59:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 18:59:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2020-12-22 18:59:59,523 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 32 [2020-12-22 18:59:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:59,523 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2020-12-22 18:59:59,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 18:59:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2020-12-22 18:59:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 18:59:59,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:59,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:59,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 18:59:59,738 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash 608149782, now seen corresponding path program 1 times [2020-12-22 18:59:59,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:59,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711084732] [2020-12-22 18:59:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:59,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711084732] [2020-12-22 18:59:59,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424595598] [2020-12-22 18:59:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:59,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 18:59:59,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:00,020 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:00,021 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:00,022 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:00,050 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:00:00,052 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:00,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:00:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:00,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:00,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-12-22 19:00:00,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19347574] [2020-12-22 19:00:00,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:00:00,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:00,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:00:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:00:00,283 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand 20 states. [2020-12-22 19:00:01,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:01,287 INFO L93 Difference]: Finished difference Result 206 states and 227 transitions. [2020-12-22 19:00:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:00:01,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-12-22 19:00:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:01,289 INFO L225 Difference]: With dead ends: 206 [2020-12-22 19:00:01,289 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 19:00:01,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:00:01,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 19:00:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 162. [2020-12-22 19:00:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 19:00:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2020-12-22 19:00:01,295 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 32 [2020-12-22 19:00:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:01,295 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2020-12-22 19:00:01,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:00:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2020-12-22 19:00:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:00:01,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:01,296 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:01,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:00:01,511 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:01,512 INFO L82 PathProgramCache]: Analyzing trace with hash -445225321, now seen corresponding path program 4 times [2020-12-22 19:00:01,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:01,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440681601] [2020-12-22 19:00:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:01,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440681601] [2020-12-22 19:00:01,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130356456] [2020-12-22 19:00:01,675 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 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 [2020-12-22 19:00:01,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:00:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:01,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:00:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:01,895 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:00:01,896 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:01,905 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:01,906 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:01,907 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:00:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:02,406 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:02,406 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 52 [2020-12-22 19:00:02,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:00:02,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:00:02,412 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:02,453 INFO L625 ElimStorePlain]: treesize reduction 9, result has 79.1 percent of original size [2020-12-22 19:00:02,459 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:02,459 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:3 [2020-12-22 19:00:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:02,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:02,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2020-12-22 19:00:02,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595761874] [2020-12-22 19:00:02,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:00:02,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:02,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:00:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:00:02,471 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand 27 states. [2020-12-22 19:00:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:05,156 INFO L93 Difference]: Finished difference Result 302 states and 328 transitions. [2020-12-22 19:00:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 19:00:05,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-22 19:00:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:05,158 INFO L225 Difference]: With dead ends: 302 [2020-12-22 19:00:05,158 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 19:00:05,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 19:00:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 19:00:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 196. [2020-12-22 19:00:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 19:00:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2020-12-22 19:00:05,167 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 33 [2020-12-22 19:00:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:05,167 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2020-12-22 19:00:05,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:00:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2020-12-22 19:00:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:00:05,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:05,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:05,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:05,384 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1756979051, now seen corresponding path program 2 times [2020-12-22 19:00:05,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:05,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838471437] [2020-12-22 19:00:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:05,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838471437] [2020-12-22 19:00:05,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554027420] [2020-12-22 19:00:05,567 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 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 [2020-12-22 19:00:05,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:05,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:00:05,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:05,695 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:05,696 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:05,698 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:05,732 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:00:05,734 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:05,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:00:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:06,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:06,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-22 19:00:06,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536904820] [2020-12-22 19:00:06,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:00:06,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:06,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:00:06,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:00:06,019 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand 19 states. [2020-12-22 19:00:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:06,941 INFO L93 Difference]: Finished difference Result 218 states and 240 transitions. [2020-12-22 19:00:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:06,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-12-22 19:00:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:06,944 INFO L225 Difference]: With dead ends: 218 [2020-12-22 19:00:06,944 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 19:00:06,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:00:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 19:00:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 198. [2020-12-22 19:00:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 19:00:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 223 transitions. [2020-12-22 19:00:06,950 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 223 transitions. Word has length 33 [2020-12-22 19:00:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:06,950 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 223 transitions. [2020-12-22 19:00:06,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:00:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 223 transitions. [2020-12-22 19:00:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 19:00:06,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:06,951 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:07,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:07,165 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2020-12-22 19:00:07,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:07,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468016074] [2020-12-22 19:00:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:07,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468016074] [2020-12-22 19:00:07,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704695141] [2020-12-22 19:00:07,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:07,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:00:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 19:00:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:07,703 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_28|]} [2020-12-22 19:00:07,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:07,712 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:00:07,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:07,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:07,730 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:00:07,732 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:07,742 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:07,744 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:07,745 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-22 19:00:07,904 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 19:00:07,905 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:07,914 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:07,915 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:07,915 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 19:00:07,966 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-12-22 19:00:07,968 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:07,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:07,979 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:07,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:31 [2020-12-22 19:00:08,323 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:08,323 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 60 [2020-12-22 19:00:08,326 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:08,369 INFO L625 ElimStorePlain]: treesize reduction 19, result has 72.1 percent of original size [2020-12-22 19:00:08,371 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:08,390 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-12-22 19:00:08,528 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 19:00:08,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:08,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:08,547 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:08,548 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:20 [2020-12-22 19:00:08,671 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 19:00:08,674 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:08,685 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:08,689 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:08,692 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:08,693 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-22 19:00:08,694 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:08,703 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:08,705 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:08,706 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-12-22 19:00:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:08,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:08,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2020-12-22 19:00:08,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194286485] [2020-12-22 19:00:08,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:00:08,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:08,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:00:08,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:00:08,716 INFO L87 Difference]: Start difference. First operand 198 states and 223 transitions. Second operand 30 states. [2020-12-22 19:00:09,757 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 19:00:10,298 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 19:00:11,995 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 19:00:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:12,382 INFO L93 Difference]: Finished difference Result 304 states and 338 transitions. [2020-12-22 19:00:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 19:00:12,383 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 36 [2020-12-22 19:00:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:12,385 INFO L225 Difference]: With dead ends: 304 [2020-12-22 19:00:12,385 INFO L226 Difference]: Without dead ends: 285 [2020-12-22 19:00:12,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=376, Invalid=2816, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 19:00:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-22 19:00:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-12-22 19:00:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-22 19:00:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 301 transitions. [2020-12-22 19:00:12,394 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 301 transitions. Word has length 36 [2020-12-22 19:00:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:12,395 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 301 transitions. [2020-12-22 19:00:12,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:00:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 301 transitions. [2020-12-22 19:00:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:00:12,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:12,396 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:12,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:12,611 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:12,612 INFO L82 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 5 times [2020-12-22 19:00:12,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:12,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837003819] [2020-12-22 19:00:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:12,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837003819] [2020-12-22 19:00:12,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137185910] [2020-12-22 19:00:12,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:12,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 19:00:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:12,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:00:12,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:12,915 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:12,915 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:12,917 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:12,947 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:00:12,952 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:12,952 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 19:00:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:13,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:13,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-22 19:00:13,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643233528] [2020-12-22 19:00:13,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:00:13,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:00:13,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:00:13,221 INFO L87 Difference]: Start difference. First operand 266 states and 301 transitions. Second operand 20 states. [2020-12-22 19:00:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:13,993 INFO L93 Difference]: Finished difference Result 445 states and 490 transitions. [2020-12-22 19:00:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:00:13,994 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-12-22 19:00:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:13,996 INFO L225 Difference]: With dead ends: 445 [2020-12-22 19:00:13,997 INFO L226 Difference]: Without dead ends: 445 [2020-12-22 19:00:13,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:00:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-12-22 19:00:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 278. [2020-12-22 19:00:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-22 19:00:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 316 transitions. [2020-12-22 19:00:14,006 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 316 transitions. Word has length 37 [2020-12-22 19:00:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:14,006 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 316 transitions. [2020-12-22 19:00:14,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:00:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 316 transitions. [2020-12-22 19:00:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 19:00:14,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:14,008 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:14,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 19:00:14,221 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:14,222 INFO L82 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 2 times [2020-12-22 19:00:14,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:14,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510702086] [2020-12-22 19:00:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:14,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510702086] [2020-12-22 19:00:14,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317826369] [2020-12-22 19:00:14,440 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 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 [2020-12-22 19:00:14,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:14,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:00:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:14,566 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:14,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:14,568 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:14,603 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:00:14,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:14,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 19:00:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:14,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:14,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-12-22 19:00:14,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8109467] [2020-12-22 19:00:14,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:00:14,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:14,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:00:14,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:00:14,993 INFO L87 Difference]: Start difference. First operand 278 states and 316 transitions. Second operand 24 states. [2020-12-22 19:00:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:17,814 INFO L93 Difference]: Finished difference Result 383 states and 418 transitions. [2020-12-22 19:00:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 19:00:17,814 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2020-12-22 19:00:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:17,816 INFO L225 Difference]: With dead ends: 383 [2020-12-22 19:00:17,817 INFO L226 Difference]: Without dead ends: 342 [2020-12-22 19:00:17,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:00:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-22 19:00:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 271. [2020-12-22 19:00:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 19:00:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 305 transitions. [2020-12-22 19:00:17,827 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 305 transitions. Word has length 39 [2020-12-22 19:00:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:17,828 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 305 transitions. [2020-12-22 19:00:17,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:00:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 305 transitions. [2020-12-22 19:00:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 19:00:17,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:17,829 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:18,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 19:00:18,044 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash 509207573, now seen corresponding path program 6 times [2020-12-22 19:00:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:18,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912424203] [2020-12-22 19:00:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:18,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912424203] [2020-12-22 19:00:18,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793498679] [2020-12-22 19:00:18,296 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 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 [2020-12-22 19:00:18,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 19:00:18,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:18,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 19:00:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:18,533 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:00:18,534 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:18,541 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:18,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:18,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:00:18,646 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:00:18,648 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:18,650 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:18,651 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:18,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:00:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:18,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:18,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2020-12-22 19:00:18,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510870075] [2020-12-22 19:00:18,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:00:18,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:18,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:00:18,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:00:18,660 INFO L87 Difference]: Start difference. First operand 271 states and 305 transitions. Second operand 23 states. [2020-12-22 19:00:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:19,569 INFO L93 Difference]: Finished difference Result 526 states and 572 transitions. [2020-12-22 19:00:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:00:19,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2020-12-22 19:00:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:19,573 INFO L225 Difference]: With dead ends: 526 [2020-12-22 19:00:19,573 INFO L226 Difference]: Without dead ends: 512 [2020-12-22 19:00:19,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:00:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-12-22 19:00:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 329. [2020-12-22 19:00:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-12-22 19:00:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 370 transitions. [2020-12-22 19:00:19,583 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 370 transitions. Word has length 40 [2020-12-22 19:00:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:19,583 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 370 transitions. [2020-12-22 19:00:19,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:00:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 370 transitions. [2020-12-22 19:00:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 19:00:19,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:19,585 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:19,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 19:00:19,787 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:19,788 INFO L82 PathProgramCache]: Analyzing trace with hash 500447765, now seen corresponding path program 5 times [2020-12-22 19:00:19,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:19,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714604312] [2020-12-22 19:00:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:19,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714604312] [2020-12-22 19:00:19,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373002617] [2020-12-22 19:00:19,984 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 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 [2020-12-22 19:00:20,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 19:00:20,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:20,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 19:00:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:20,095 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_29|]} [2020-12-22 19:00:20,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:20,101 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:00:20,102 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:20,112 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:20,117 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:00:20,122 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:20,133 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:20,135 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:20,135 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-22 19:00:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:20,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:20,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2020-12-22 19:00:20,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658239981] [2020-12-22 19:00:20,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:00:20,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:20,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:00:20,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:00:20,496 INFO L87 Difference]: Start difference. First operand 329 states and 370 transitions. Second operand 22 states. [2020-12-22 19:00:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:21,431 INFO L93 Difference]: Finished difference Result 351 states and 385 transitions. [2020-12-22 19:00:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:00:21,432 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-12-22 19:00:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:21,434 INFO L225 Difference]: With dead ends: 351 [2020-12-22 19:00:21,434 INFO L226 Difference]: Without dead ends: 351 [2020-12-22 19:00:21,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:00:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-22 19:00:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 334. [2020-12-22 19:00:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 19:00:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 375 transitions. [2020-12-22 19:00:21,443 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 375 transitions. Word has length 40 [2020-12-22 19:00:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:21,443 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 375 transitions. [2020-12-22 19:00:21,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:00:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 375 transitions. [2020-12-22 19:00:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 19:00:21,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:21,444 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:21,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 19:00:21,659 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1665988438, now seen corresponding path program 3 times [2020-12-22 19:00:21,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:21,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478840859] [2020-12-22 19:00:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:21,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478840859] [2020-12-22 19:00:21,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753822839] [2020-12-22 19:00:21,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:21,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:00:21,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 19:00:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:22,011 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:22,011 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:22,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:22,039 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:00:22,041 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:22,041 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:00:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:22,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:22,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-22 19:00:22,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018364856] [2020-12-22 19:00:22,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:00:22,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:22,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:00:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:00:22,368 INFO L87 Difference]: Start difference. First operand 334 states and 375 transitions. Second operand 23 states. [2020-12-22 19:00:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:23,876 INFO L93 Difference]: Finished difference Result 370 states and 406 transitions. [2020-12-22 19:00:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:00:23,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-12-22 19:00:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:23,880 INFO L225 Difference]: With dead ends: 370 [2020-12-22 19:00:23,880 INFO L226 Difference]: Without dead ends: 370 [2020-12-22 19:00:23,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:00:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-22 19:00:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 336. [2020-12-22 19:00:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-12-22 19:00:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 377 transitions. [2020-12-22 19:00:23,887 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 377 transitions. Word has length 41 [2020-12-22 19:00:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:23,888 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 377 transitions. [2020-12-22 19:00:23,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:00:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 377 transitions. [2020-12-22 19:00:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 19:00:23,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:23,889 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:24,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 19:00:24,104 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 7 times [2020-12-22 19:00:24,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:24,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489452610] [2020-12-22 19:00:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:24,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489452610] [2020-12-22 19:00:24,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069612512] [2020-12-22 19:00:24,352 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 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 [2020-12-22 19:00:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:00:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:24,454 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:24,455 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:24,456 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:24,492 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:00:24,497 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:24,497 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 19:00:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:24,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:24,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2020-12-22 19:00:24,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061351127] [2020-12-22 19:00:24,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:00:24,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:00:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:00:24,973 INFO L87 Difference]: Start difference. First operand 336 states and 377 transitions. Second operand 27 states. [2020-12-22 19:00:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:26,490 INFO L93 Difference]: Finished difference Result 598 states and 652 transitions. [2020-12-22 19:00:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:00:26,491 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-12-22 19:00:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:26,495 INFO L225 Difference]: With dead ends: 598 [2020-12-22 19:00:26,495 INFO L226 Difference]: Without dead ends: 598 [2020-12-22 19:00:26,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:00:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-22 19:00:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 348. [2020-12-22 19:00:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-12-22 19:00:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 392 transitions. [2020-12-22 19:00:26,505 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 392 transitions. Word has length 44 [2020-12-22 19:00:26,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:26,505 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 392 transitions. [2020-12-22 19:00:26,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:00:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 392 transitions. [2020-12-22 19:00:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 19:00:26,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:26,507 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:26,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:26,722 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1180553501, now seen corresponding path program 6 times [2020-12-22 19:00:26,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:26,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063067828] [2020-12-22 19:00:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:27,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063067828] [2020-12-22 19:00:27,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817489214] [2020-12-22 19:00:27,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 19:00:27,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:00:27,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:27,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 19:00:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:27,436 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_30|]} [2020-12-22 19:00:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:27,441 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:00:27,442 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:27,455 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:27,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:00:27,463 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:27,475 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:27,476 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:27,477 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2020-12-22 19:00:27,779 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:00:27,781 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:27,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:27,797 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:27,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 19:00:27,868 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2020-12-22 19:00:27,869 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:27,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:27,889 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:27,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:43 [2020-12-22 19:00:28,185 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:28,186 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 56 [2020-12-22 19:00:28,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,244 INFO L625 ElimStorePlain]: treesize reduction 14, result has 78.8 percent of original size [2020-12-22 19:00:28,247 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,247 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:32 [2020-12-22 19:00:28,420 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 19:00:28,421 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:28,443 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,443 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2020-12-22 19:00:28,618 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 19:00:28,620 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:28,640 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:28 [2020-12-22 19:00:28,776 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2020-12-22 19:00:28,778 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:28,790 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:28,800 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:28,800 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-22 19:00:28,804 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,813 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:28,815 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:28,815 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:3 [2020-12-22 19:00:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:28,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:28,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2020-12-22 19:00:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074140285] [2020-12-22 19:00:28,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:00:28,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:00:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:00:28,832 INFO L87 Difference]: Start difference. First operand 348 states and 392 transitions. Second operand 37 states. [2020-12-22 19:00:29,789 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 19:00:30,163 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 19:00:30,523 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 19:00:30,929 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-12-22 19:00:31,338 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 19:00:31,677 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 19:00:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:33,125 INFO L93 Difference]: Finished difference Result 508 states and 564 transitions. [2020-12-22 19:00:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 19:00:33,126 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-12-22 19:00:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:33,128 INFO L225 Difference]: With dead ends: 508 [2020-12-22 19:00:33,128 INFO L226 Difference]: Without dead ends: 484 [2020-12-22 19:00:33,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:00:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-22 19:00:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 444. [2020-12-22 19:00:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-12-22 19:00:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 503 transitions. [2020-12-22 19:00:33,140 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 503 transitions. Word has length 44 [2020-12-22 19:00:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:33,141 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 503 transitions. [2020-12-22 19:00:33,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:00:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 503 transitions. [2020-12-22 19:00:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 19:00:33,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:33,142 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:33,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 19:00:33,357 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1942078596, now seen corresponding path program 3 times [2020-12-22 19:00:33,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:33,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962047270] [2020-12-22 19:00:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:33,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962047270] [2020-12-22 19:00:33,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270146614] [2020-12-22 19:00:33,635 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 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 [2020-12-22 19:00:33,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:00:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 19:00:33,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:33,775 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:33,776 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:33,777 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:33,819 INFO L625 ElimStorePlain]: treesize reduction 10, result has 74.4 percent of original size [2020-12-22 19:00:33,821 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:33,822 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-22 19:00:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:34,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:34,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2020-12-22 19:00:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177394838] [2020-12-22 19:00:34,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:00:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:00:34,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:00:34,471 INFO L87 Difference]: Start difference. First operand 444 states and 503 transitions. Second operand 29 states. [2020-12-22 19:00:36,572 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-22 19:00:36,728 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 19:00:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:38,748 INFO L93 Difference]: Finished difference Result 671 states and 729 transitions. [2020-12-22 19:00:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 19:00:38,749 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-12-22 19:00:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:38,752 INFO L225 Difference]: With dead ends: 671 [2020-12-22 19:00:38,752 INFO L226 Difference]: Without dead ends: 627 [2020-12-22 19:00:38,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=538, Invalid=2654, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 19:00:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-12-22 19:00:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 424. [2020-12-22 19:00:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-12-22 19:00:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 475 transitions. [2020-12-22 19:00:38,764 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 475 transitions. Word has length 46 [2020-12-22 19:00:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:38,773 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 475 transitions. [2020-12-22 19:00:38,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:00:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 475 transitions. [2020-12-22 19:00:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:00:38,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:38,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:38,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:38,988 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:38,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1771580303, now seen corresponding path program 8 times [2020-12-22 19:00:38,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:38,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853753892] [2020-12-22 19:00:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:39,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853753892] [2020-12-22 19:00:39,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034876205] [2020-12-22 19:00:39,266 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 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 [2020-12-22 19:00:39,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:39,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 19:00:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:39,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:00:39,593 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:39,602 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:39,603 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:39,604 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:00:39,849 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:00:39,850 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:39,852 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:39,853 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:39,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-22 19:00:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:39,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:39,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2020-12-22 19:00:39,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520204876] [2020-12-22 19:00:39,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:00:39,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:39,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:00:39,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:00:39,867 INFO L87 Difference]: Start difference. First operand 424 states and 475 transitions. Second operand 31 states. [2020-12-22 19:00:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:41,399 INFO L93 Difference]: Finished difference Result 914 states and 989 transitions. [2020-12-22 19:00:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:00:41,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 47 [2020-12-22 19:00:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:41,404 INFO L225 Difference]: With dead ends: 914 [2020-12-22 19:00:41,404 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 19:00:41,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:00:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 19:00:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 512. [2020-12-22 19:00:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-12-22 19:00:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 574 transitions. [2020-12-22 19:00:41,418 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 574 transitions. Word has length 47 [2020-12-22 19:00:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:41,418 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 574 transitions. [2020-12-22 19:00:41,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:00:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 574 transitions. [2020-12-22 19:00:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:00:41,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:41,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:41,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 19:00:41,635 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash 995519473, now seen corresponding path program 4 times [2020-12-22 19:00:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:41,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684512213] [2020-12-22 19:00:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:41,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684512213] [2020-12-22 19:00:41,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797971878] [2020-12-22 19:00:41,865 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 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 [2020-12-22 19:00:41,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:00:41,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 19:00:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:41,982 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_31|]} [2020-12-22 19:00:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:41,988 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:00:41,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:42,006 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:42,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:42,012 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-22 19:00:42,015 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:42,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:42,030 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:42,030 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:16 [2020-12-22 19:00:42,100 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:00:42,101 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:42,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:42,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:42,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-12-22 19:00:42,238 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:42,239 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 19:00:42,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:00:42,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:42,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:00:42,261 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 19:00:42,263 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:42,264 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:44 [2020-12-22 19:00:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:00:42,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:42,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2020-12-22 19:00:42,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265250369] [2020-12-22 19:00:42,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:00:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:42,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:00:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:00:42,801 INFO L87 Difference]: Start difference. First operand 512 states and 574 transitions. Second operand 27 states. [2020-12-22 19:00:45,089 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-22 19:00:45,280 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 19:00:48,324 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 19:01:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:10,001 INFO L93 Difference]: Finished difference Result 723 states and 783 transitions. [2020-12-22 19:01:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 19:01:10,001 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 47 [2020-12-22 19:01:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:10,004 INFO L225 Difference]: With dead ends: 723 [2020-12-22 19:01:10,005 INFO L226 Difference]: Without dead ends: 671 [2020-12-22 19:01:10,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=879, Invalid=6234, Unknown=27, NotChecked=0, Total=7140 [2020-12-22 19:01:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2020-12-22 19:01:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 515. [2020-12-22 19:01:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-12-22 19:01:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 577 transitions. [2020-12-22 19:01:10,017 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 577 transitions. Word has length 47 [2020-12-22 19:01:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:10,018 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 577 transitions. [2020-12-22 19:01:10,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:01:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 577 transitions. [2020-12-22 19:01:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 19:01:10,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:10,019 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:10,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:10,233 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:10,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:10,234 INFO L82 PathProgramCache]: Analyzing trace with hash 588049120, now seen corresponding path program 7 times [2020-12-22 19:01:10,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:10,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164797702] [2020-12-22 19:01:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:10,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164797702] [2020-12-22 19:01:10,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369420491] [2020-12-22 19:01:10,512 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 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 [2020-12-22 19:01:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 19:01:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:10,634 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_37|], 1=[|v_#valid_32|]} [2020-12-22 19:01:10,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:10,640 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:01:10,642 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:10,659 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:01:10,661 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,672 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:10,674 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,674 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:01:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:11,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:11,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2020-12-22 19:01:11,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705566501] [2020-12-22 19:01:11,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:01:11,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:11,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:01:11,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:01:11,187 INFO L87 Difference]: Start difference. First operand 515 states and 577 transitions. Second operand 27 states. [2020-12-22 19:01:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:12,571 INFO L93 Difference]: Finished difference Result 558 states and 611 transitions. [2020-12-22 19:01:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:01:12,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2020-12-22 19:01:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:12,575 INFO L225 Difference]: With dead ends: 558 [2020-12-22 19:01:12,575 INFO L226 Difference]: Without dead ends: 558 [2020-12-22 19:01:12,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=240, Invalid=1242, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:01:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-12-22 19:01:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2020-12-22 19:01:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-12-22 19:01:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 582 transitions. [2020-12-22 19:01:12,587 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 582 transitions. Word has length 48 [2020-12-22 19:01:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:12,587 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 582 transitions. [2020-12-22 19:01:12,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:01:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 582 transitions. [2020-12-22 19:01:12,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 19:01:12,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:12,589 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:12,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 19:01:12,803 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1049653567, now seen corresponding path program 4 times [2020-12-22 19:01:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:12,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683549946] [2020-12-22 19:01:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:13,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683549946] [2020-12-22 19:01:13,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928518877] [2020-12-22 19:01:13,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:13,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:13,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 19:01:13,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:13,171 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_38|], 1=[|v_#valid_33|]} [2020-12-22 19:01:13,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:13,179 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:01:13,180 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:13,194 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:13,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-22 19:01:13,202 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:13,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:13,215 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:13,215 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2020-12-22 19:01:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:13,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:13,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-22 19:01:13,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638144379] [2020-12-22 19:01:13,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:01:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:01:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:01:13,913 INFO L87 Difference]: Start difference. First operand 520 states and 582 transitions. Second operand 27 states. [2020-12-22 19:01:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:16,602 INFO L93 Difference]: Finished difference Result 583 states and 639 transitions. [2020-12-22 19:01:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:01:16,603 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 49 [2020-12-22 19:01:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:16,606 INFO L225 Difference]: With dead ends: 583 [2020-12-22 19:01:16,606 INFO L226 Difference]: Without dead ends: 583 [2020-12-22 19:01:16,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:01:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2020-12-22 19:01:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 522. [2020-12-22 19:01:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-12-22 19:01:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 584 transitions. [2020-12-22 19:01:16,616 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 584 transitions. Word has length 49 [2020-12-22 19:01:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:16,616 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 584 transitions. [2020-12-22 19:01:16,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:01:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 584 transitions. [2020-12-22 19:01:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 19:01:16,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:16,618 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:16,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:16,832 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 9 times [2020-12-22 19:01:16,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:16,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951881865] [2020-12-22 19:01:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:17,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951881865] [2020-12-22 19:01:17,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96214958] [2020-12-22 19:01:17,153 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:17,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 19:01:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:01:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:17,308 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:17,308 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:17,310 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,345 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:01:17,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 19:01:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:17,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:17,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2020-12-22 19:01:17,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979861739] [2020-12-22 19:01:17,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:01:17,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:17,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:01:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:01:17,995 INFO L87 Difference]: Start difference. First operand 522 states and 584 transitions. Second operand 32 states. [2020-12-22 19:01:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:20,338 INFO L93 Difference]: Finished difference Result 969 states and 1053 transitions. [2020-12-22 19:01:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:01:20,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 51 [2020-12-22 19:01:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:20,343 INFO L225 Difference]: With dead ends: 969 [2020-12-22 19:01:20,343 INFO L226 Difference]: Without dead ends: 969 [2020-12-22 19:01:20,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=1678, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:01:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-12-22 19:01:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 537. [2020-12-22 19:01:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-12-22 19:01:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 603 transitions. [2020-12-22 19:01:20,354 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 603 transitions. Word has length 51 [2020-12-22 19:01:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:20,354 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 603 transitions. [2020-12-22 19:01:20,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:01:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 603 transitions. [2020-12-22 19:01:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 19:01:20,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:20,356 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:20,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 19:01:20,570 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:20,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1427430296, now seen corresponding path program 8 times [2020-12-22 19:01:20,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:20,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884322014] [2020-12-22 19:01:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884322014] [2020-12-22 19:01:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362885886] [2020-12-22 19:01:21,349 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:21,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:01:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-22 19:01:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:21,863 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:21,864 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:21,877 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:21,879 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:21,879 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-22 19:01:21,992 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:21,992 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-22 19:01:21,994 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:22,036 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-22 19:01:22,037 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:22,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:01:22,603 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-12-22 19:01:22,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:22,955 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 19:01:22,955 INFO L348 Elim1Store]: treesize reduction 20, result has 80.4 percent of original size [2020-12-22 19:01:22,956 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 98 [2020-12-22 19:01:22,959 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:23,038 INFO L625 ElimStorePlain]: treesize reduction 46, result has 53.1 percent of original size [2020-12-22 19:01:23,040 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:23,041 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:23,042 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:52 [2020-12-22 19:01:23,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:23,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:23,578 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-12-22 19:01:23,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:23,587 INFO L443 ElimStorePlain]: Different costs {11=[v_prenex_8], 19=[|v_#memory_int_33|]} [2020-12-22 19:01:23,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:23,616 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:23,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 57 [2020-12-22 19:01:23,619 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:23,759 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 19:01:23,762 INFO L625 ElimStorePlain]: treesize reduction 12, result has 90.2 percent of original size [2020-12-22 19:01:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:23,990 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-22 19:01:23,991 INFO L348 Elim1Store]: treesize reduction 32, result has 79.9 percent of original size [2020-12-22 19:01:23,993 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 47 treesize of output 147 [2020-12-22 19:01:23,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 19:01:23,996 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-22 19:01:23,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 19:01:23,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:01:23,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:24,001 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:24,211 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-12-22 19:01:24,212 INFO L625 ElimStorePlain]: treesize reduction 87, result has 61.0 percent of original size [2020-12-22 19:01:24,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:24,221 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-12-22 19:01:24,221 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:110, output treesize:125 [2020-12-22 19:01:24,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:24,559 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2020-12-22 19:01:24,560 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:24,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:24,581 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:24,581 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:31 [2020-12-22 19:01:24,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:24,844 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2020-12-22 19:01:24,845 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:24,862 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:24,865 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:24,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:42, output treesize:27 [2020-12-22 19:01:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:25,088 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:25,090 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:25,091 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2020-12-22 19:01:25,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:25,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:25,101 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:25,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:3 [2020-12-22 19:01:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:25,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:25,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 48 [2020-12-22 19:01:25,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673473112] [2020-12-22 19:01:25,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 19:01:25,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:25,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 19:01:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:01:25,124 INFO L87 Difference]: Start difference. First operand 537 states and 603 transitions. Second operand 48 states. [2020-12-22 19:01:26,935 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-22 19:01:27,161 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-12-22 19:01:27,432 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-22 19:01:27,814 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-12-22 19:01:28,198 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-12-22 19:01:28,545 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-12-22 19:01:28,891 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-22 19:01:29,265 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-12-22 19:01:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:32,666 INFO L93 Difference]: Finished difference Result 764 states and 848 transitions. [2020-12-22 19:01:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 19:01:32,667 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2020-12-22 19:01:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:32,670 INFO L225 Difference]: With dead ends: 764 [2020-12-22 19:01:32,670 INFO L226 Difference]: Without dead ends: 737 [2020-12-22 19:01:32,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=555, Invalid=6585, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 19:01:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-12-22 19:01:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 661. [2020-12-22 19:01:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-12-22 19:01:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 747 transitions. [2020-12-22 19:01:32,681 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 747 transitions. Word has length 52 [2020-12-22 19:01:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:32,682 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 747 transitions. [2020-12-22 19:01:32,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 19:01:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 747 transitions. [2020-12-22 19:01:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 19:01:32,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:32,683 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:32,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:32,898 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:32,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1083226314, now seen corresponding path program 5 times [2020-12-22 19:01:32,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:32,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995211454] [2020-12-22 19:01:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:33,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995211454] [2020-12-22 19:01:33,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363046873] [2020-12-22 19:01:33,271 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:33,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 19:01:33,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 19:01:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:33,398 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:33,399 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:33,401 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:33,435 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:01:33,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:33,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:01:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:33,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:33,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-12-22 19:01:33,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040272829] [2020-12-22 19:01:33,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:01:33,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:33,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:01:33,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:01:33,979 INFO L87 Difference]: Start difference. First operand 661 states and 747 transitions. Second operand 28 states. [2020-12-22 19:01:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:36,202 INFO L93 Difference]: Finished difference Result 1030 states and 1120 transitions. [2020-12-22 19:01:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:01:36,203 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2020-12-22 19:01:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:36,206 INFO L225 Difference]: With dead ends: 1030 [2020-12-22 19:01:36,207 INFO L226 Difference]: Without dead ends: 994 [2020-12-22 19:01:36,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:01:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2020-12-22 19:01:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 622. [2020-12-22 19:01:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2020-12-22 19:01:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 695 transitions. [2020-12-22 19:01:36,219 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 695 transitions. Word has length 53 [2020-12-22 19:01:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:36,219 INFO L481 AbstractCegarLoop]: Abstraction has 622 states and 695 transitions. [2020-12-22 19:01:36,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:01:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 695 transitions. [2020-12-22 19:01:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 19:01:36,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:36,221 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:36,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 19:01:36,434 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash 97693371, now seen corresponding path program 10 times [2020-12-22 19:01:36,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:36,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143901171] [2020-12-22 19:01:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:01:36,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143901171] [2020-12-22 19:01:36,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555452362] [2020-12-22 19:01:36,771 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:36,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:36,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 19:01:36,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:37,191 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:37,193 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:37,203 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:37,205 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:37,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:01:38,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:38,902 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:38,903 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 103 [2020-12-22 19:01:38,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:38,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:38,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:38,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:38,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:38,916 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:38,993 INFO L625 ElimStorePlain]: treesize reduction 9, result has 85.9 percent of original size [2020-12-22 19:01:39,007 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:39,008 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:3 [2020-12-22 19:01:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:01:39,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:39,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29] total 45 [2020-12-22 19:01:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009207434] [2020-12-22 19:01:39,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 19:01:39,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 19:01:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:01:39,036 INFO L87 Difference]: Start difference. First operand 622 states and 695 transitions. Second operand 45 states. [2020-12-22 19:01:49,455 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-12-22 19:01:51,428 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-22 19:01:52,240 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-12-22 19:01:52,495 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-12-22 19:01:52,923 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-22 19:01:53,211 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-12-22 19:01:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:55,428 INFO L93 Difference]: Finished difference Result 1446 states and 1559 transitions. [2020-12-22 19:01:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 19:01:55,429 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-12-22 19:01:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:55,433 INFO L225 Difference]: With dead ends: 1446 [2020-12-22 19:01:55,433 INFO L226 Difference]: Without dead ends: 1426 [2020-12-22 19:01:55,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6329 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1846, Invalid=19324, Unknown=0, NotChecked=0, Total=21170 [2020-12-22 19:01:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2020-12-22 19:01:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 746. [2020-12-22 19:01:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-12-22 19:01:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 835 transitions. [2020-12-22 19:01:55,449 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 835 transitions. Word has length 54 [2020-12-22 19:01:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:55,450 INFO L481 AbstractCegarLoop]: Abstraction has 746 states and 835 transitions. [2020-12-22 19:01:55,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 19:01:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 835 transitions. [2020-12-22 19:01:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 19:01:55,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:55,452 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:55,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 19:01:55,666 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 411662583, now seen corresponding path program 6 times [2020-12-22 19:01:55,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:55,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685049870] [2020-12-22 19:01:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:56,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685049870] [2020-12-22 19:01:56,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237488213] [2020-12-22 19:01:56,055 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:56,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 19:01:56,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:56,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 19:01:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:56,180 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:56,181 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:56,182 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:56,224 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:01:56,227 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:56,227 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:01:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:01:56,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:56,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2020-12-22 19:01:56,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925195687] [2020-12-22 19:01:56,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:01:56,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:56,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:01:56,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:01:56,970 INFO L87 Difference]: Start difference. First operand 746 states and 835 transitions. Second operand 30 states. [2020-12-22 19:02:01,459 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 19:02:02,023 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 19:02:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:04,932 INFO L93 Difference]: Finished difference Result 1134 states and 1224 transitions. [2020-12-22 19:02:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 19:02:04,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 54 [2020-12-22 19:02:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:04,938 INFO L225 Difference]: With dead ends: 1134 [2020-12-22 19:02:04,938 INFO L226 Difference]: Without dead ends: 1067 [2020-12-22 19:02:04,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1427, Invalid=5215, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 19:02:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-12-22 19:02:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 755. [2020-12-22 19:02:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-12-22 19:02:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 844 transitions. [2020-12-22 19:02:04,952 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 844 transitions. Word has length 54 [2020-12-22 19:02:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:04,953 INFO L481 AbstractCegarLoop]: Abstraction has 755 states and 844 transitions. [2020-12-22 19:02:04,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:02:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 844 transitions. [2020-12-22 19:02:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 19:02:04,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:04,954 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:05,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 19:02:05,168 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 126995243, now seen corresponding path program 9 times [2020-12-22 19:02:05,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:05,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283754554] [2020-12-22 19:02:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283754554] [2020-12-22 19:02:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310158226] [2020-12-22 19:02:05,552 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:05,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 19:02:05,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 19:02:05,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:05,811 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:05,812 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:05,814 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:05,863 INFO L625 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2020-12-22 19:02:05,865 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:05,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:22 [2020-12-22 19:02:06,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:06,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:06,301 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 19:02:06,302 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:06,307 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 19:02:06,308 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:06,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:06,336 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-12-22 19:02:06,336 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2020-12-22 19:02:06,514 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 19:02:06,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:06,717 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-22 19:02:06,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:06,722 INFO L443 ElimStorePlain]: Different costs {0=[v_prenex_10], 1=[|#memory_int|]} [2020-12-22 19:02:06,727 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:02:06,728 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:06,747 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:06,757 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:06,757 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2020-12-22 19:02:06,760 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-22 19:02:06,804 INFO L625 ElimStorePlain]: treesize reduction 4, result has 84.0 percent of original size [2020-12-22 19:02:06,807 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 19:02:06,807 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:17 [2020-12-22 19:02:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:07,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:07,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 35 [2020-12-22 19:02:07,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443667464] [2020-12-22 19:02:07,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:02:07,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:07,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:02:07,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:02:07,384 INFO L87 Difference]: Start difference. First operand 755 states and 844 transitions. Second operand 36 states. [2020-12-22 19:02:08,993 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-12-22 19:02:09,344 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-12-22 19:02:09,685 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-12-22 19:02:10,073 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 19:02:10,647 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 19:02:11,205 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 19:02:11,761 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 19:02:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:12,763 INFO L93 Difference]: Finished difference Result 870 states and 949 transitions. [2020-12-22 19:02:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 19:02:12,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2020-12-22 19:02:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:12,768 INFO L225 Difference]: With dead ends: 870 [2020-12-22 19:02:12,768 INFO L226 Difference]: Without dead ends: 870 [2020-12-22 19:02:12,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=723, Invalid=3699, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 19:02:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2020-12-22 19:02:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 760. [2020-12-22 19:02:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-12-22 19:02:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 849 transitions. [2020-12-22 19:02:12,779 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 849 transitions. Word has length 56 [2020-12-22 19:02:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:12,779 INFO L481 AbstractCegarLoop]: Abstraction has 760 states and 849 transitions. [2020-12-22 19:02:12,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:02:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 849 transitions. [2020-12-22 19:02:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 19:02:12,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:12,781 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:12,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 19:02:12,996 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:12,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129529, now seen corresponding path program 7 times [2020-12-22 19:02:12,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:12,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108261885] [2020-12-22 19:02:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:13,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108261885] [2020-12-22 19:02:13,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227357090] [2020-12-22 19:02:13,475 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 19:02:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:13,627 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:13,627 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:13,629 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:13,675 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:02:13,678 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:13,678 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:02:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:14,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:14,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-22 19:02:14,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750652777] [2020-12-22 19:02:14,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:02:14,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:02:14,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:02:14,522 INFO L87 Difference]: Start difference. First operand 760 states and 849 transitions. Second operand 31 states. [2020-12-22 19:02:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:17,178 INFO L93 Difference]: Finished difference Result 940 states and 1025 transitions. [2020-12-22 19:02:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:02:17,179 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2020-12-22 19:02:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:17,183 INFO L225 Difference]: With dead ends: 940 [2020-12-22 19:02:17,183 INFO L226 Difference]: Without dead ends: 913 [2020-12-22 19:02:17,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:02:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2020-12-22 19:02:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 760. [2020-12-22 19:02:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-12-22 19:02:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 849 transitions. [2020-12-22 19:02:17,192 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 849 transitions. Word has length 56 [2020-12-22 19:02:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:17,192 INFO L481 AbstractCegarLoop]: Abstraction has 760 states and 849 transitions. [2020-12-22 19:02:17,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:02:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 849 transitions. [2020-12-22 19:02:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:02:17,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:17,194 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:17,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:17,410 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash -358114732, now seen corresponding path program 5 times [2020-12-22 19:02:17,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:17,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145997274] [2020-12-22 19:02:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:17,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145997274] [2020-12-22 19:02:17,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874783092] [2020-12-22 19:02:17,806 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:17,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 19:02:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:17,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 19:02:17,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:17,971 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:17,972 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:17,973 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:18,021 INFO L625 ElimStorePlain]: treesize reduction 10, result has 74.4 percent of original size [2020-12-22 19:02:18,023 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:18,023 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-22 19:02:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:18,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:18,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-22 19:02:18,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441092776] [2020-12-22 19:02:18,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:02:18,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:02:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:02:18,828 INFO L87 Difference]: Start difference. First operand 760 states and 849 transitions. Second operand 31 states. [2020-12-22 19:02:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:21,281 INFO L93 Difference]: Finished difference Result 861 states and 944 transitions. [2020-12-22 19:02:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:02:21,282 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-12-22 19:02:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:21,286 INFO L225 Difference]: With dead ends: 861 [2020-12-22 19:02:21,286 INFO L226 Difference]: Without dead ends: 861 [2020-12-22 19:02:21,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=266, Invalid=1714, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:02:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-12-22 19:02:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 762. [2020-12-22 19:02:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2020-12-22 19:02:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 851 transitions. [2020-12-22 19:02:21,295 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 851 transitions. Word has length 57 [2020-12-22 19:02:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:21,296 INFO L481 AbstractCegarLoop]: Abstraction has 762 states and 851 transitions. [2020-12-22 19:02:21,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:02:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 851 transitions. [2020-12-22 19:02:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 19:02:21,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:21,298 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:21,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:21,511 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:21,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:21,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1967721474, now seen corresponding path program 11 times [2020-12-22 19:02:21,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:21,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623534128] [2020-12-22 19:02:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:21,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623534128] [2020-12-22 19:02:21,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785207129] [2020-12-22 19:02:21,970 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:22,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 19:02:22,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 19:02:22,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:22,111 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:22,112 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:22,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:22,165 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:02:22,178 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:22,178 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-22 19:02:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:22,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:22,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2020-12-22 19:02:22,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89897999] [2020-12-22 19:02:22,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:02:22,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:02:22,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:02:22,974 INFO L87 Difference]: Start difference. First operand 762 states and 851 transitions. Second operand 32 states. [2020-12-22 19:02:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:25,077 INFO L93 Difference]: Finished difference Result 1472 states and 1594 transitions. [2020-12-22 19:02:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:02:25,084 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 58 [2020-12-22 19:02:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:25,090 INFO L225 Difference]: With dead ends: 1472 [2020-12-22 19:02:25,090 INFO L226 Difference]: Without dead ends: 1472 [2020-12-22 19:02:25,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:02:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-12-22 19:02:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 780. [2020-12-22 19:02:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-12-22 19:02:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 874 transitions. [2020-12-22 19:02:25,102 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 874 transitions. Word has length 58 [2020-12-22 19:02:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:25,102 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 874 transitions. [2020-12-22 19:02:25,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:02:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 874 transitions. [2020-12-22 19:02:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 19:02:25,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:25,104 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:25,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-12-22 19:02:25,319 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash 102819635, now seen corresponding path program 10 times [2020-12-22 19:02:25,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:25,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805511] [2020-12-22 19:02:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805511] [2020-12-22 19:02:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937318385] [2020-12-22 19:02:26,578 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:26,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:26,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 19:02:26,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:26,701 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_46|], 1=[|v_#valid_34|]} [2020-12-22 19:02:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:26,708 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:26,710 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:26,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:26,732 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:26,734 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:26,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:26,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:26,750 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-22 19:02:27,341 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:02:27,343 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,355 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:27,356 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,357 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-22 19:02:27,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2020-12-22 19:02:27,455 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,471 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:27,472 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:27,473 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:35 [2020-12-22 19:02:27,898 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:27,898 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 61 [2020-12-22 19:02:27,901 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,968 INFO L625 ElimStorePlain]: treesize reduction 19, result has 74.3 percent of original size [2020-12-22 19:02:27,971 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:27,972 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:51, output treesize:30 [2020-12-22 19:02:28,244 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-22 19:02:28,245 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:28,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:28,267 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:28,267 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:30 [2020-12-22 19:02:28,536 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-22 19:02:28,538 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:28,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:28,565 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:28,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:30 [2020-12-22 19:02:28,847 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-22 19:02:28,848 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:28,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:28,871 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:28,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:30 [2020-12-22 19:02:29,117 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-22 19:02:29,119 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:29,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:29,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:29,143 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:26 [2020-12-22 19:02:29,438 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2020-12-22 19:02:29,440 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:29,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:29,469 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:29,472 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:29,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2020-12-22 19:02:29,474 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:29,487 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:29,490 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:29,490 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:40, output treesize:3 [2020-12-22 19:02:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:29,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:29,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 50 [2020-12-22 19:02:29,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532029209] [2020-12-22 19:02:29,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 19:02:29,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:29,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 19:02:29,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:02:29,516 INFO L87 Difference]: Start difference. First operand 780 states and 874 transitions. Second operand 50 states. [2020-12-22 19:02:32,685 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 19:02:34,005 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 19:02:34,921 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 19:02:35,209 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 19:02:35,444 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 19:02:35,677 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 19:02:35,902 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 19:02:36,174 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-12-22 19:02:36,883 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 19:02:38,075 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 19:02:39,051 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 19:02:40,018 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-22 19:02:40,354 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 19:02:41,912 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 19:02:42,156 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 19:02:42,876 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 19:02:50,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:50,501 INFO L93 Difference]: Finished difference Result 1103 states and 1216 transitions. [2020-12-22 19:02:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 19:02:50,503 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 60 [2020-12-22 19:02:50,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:50,508 INFO L225 Difference]: With dead ends: 1103 [2020-12-22 19:02:50,508 INFO L226 Difference]: Without dead ends: 1072 [2020-12-22 19:02:50,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1053, Invalid=12753, Unknown=0, NotChecked=0, Total=13806 [2020-12-22 19:02:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-12-22 19:02:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 935. [2020-12-22 19:02:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 935 states. [2020-12-22 19:02:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1055 transitions. [2020-12-22 19:02:50,521 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1055 transitions. Word has length 60 [2020-12-22 19:02:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:50,521 INFO L481 AbstractCegarLoop]: Abstraction has 935 states and 1055 transitions. [2020-12-22 19:02:50,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 19:02:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1055 transitions. [2020-12-22 19:02:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 19:02:50,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:50,523 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:50,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:50,724 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:50,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1052716770, now seen corresponding path program 8 times [2020-12-22 19:02:50,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:50,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384528416] [2020-12-22 19:02:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:51,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384528416] [2020-12-22 19:02:51,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379490030] [2020-12-22 19:02:51,259 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:51,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 19:02:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:51,389 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:51,390 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:51,392 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:51,441 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:02:51,443 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:51,444 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:02:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:02:52,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:52,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-12-22 19:02:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351168585] [2020-12-22 19:02:52,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:02:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:02:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:02:52,403 INFO L87 Difference]: Start difference. First operand 935 states and 1055 transitions. Second operand 33 states. [2020-12-22 19:02:58,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:58,264 INFO L93 Difference]: Finished difference Result 1581 states and 1708 transitions. [2020-12-22 19:02:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:02:58,266 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 60 [2020-12-22 19:02:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:58,271 INFO L225 Difference]: With dead ends: 1581 [2020-12-22 19:02:58,271 INFO L226 Difference]: Without dead ends: 1498 [2020-12-22 19:02:58,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=548, Invalid=2758, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 19:02:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-12-22 19:02:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 880. [2020-12-22 19:02:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-12-22 19:02:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 981 transitions. [2020-12-22 19:02:58,286 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 981 transitions. Word has length 60 [2020-12-22 19:02:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:58,286 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 981 transitions. [2020-12-22 19:02:58,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:02:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 981 transitions. [2020-12-22 19:02:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:02:58,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:58,288 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:58,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:58,502 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1618209099, now seen corresponding path program 12 times [2020-12-22 19:02:58,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:58,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083741384] [2020-12-22 19:02:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:02:59,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083741384] [2020-12-22 19:02:59,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520447866] [2020-12-22 19:02:59,031 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:59,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 19:02:59,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 19:02:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:59,584 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:02:59,589 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,598 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:59,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:59,600 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:02:59,820 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:02:59,822 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,825 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:59,826 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:02:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:02:59,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:59,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2020-12-22 19:02:59,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603236595] [2020-12-22 19:02:59,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:02:59,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:02:59,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:02:59,845 INFO L87 Difference]: Start difference. First operand 880 states and 981 transitions. Second operand 32 states. [2020-12-22 19:03:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:03,234 INFO L93 Difference]: Finished difference Result 2083 states and 2239 transitions. [2020-12-22 19:03:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:03:03,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2020-12-22 19:03:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:03,242 INFO L225 Difference]: With dead ends: 2083 [2020-12-22 19:03:03,242 INFO L226 Difference]: Without dead ends: 2060 [2020-12-22 19:03:03,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:03:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2020-12-22 19:03:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1046. [2020-12-22 19:03:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-12-22 19:03:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1169 transitions. [2020-12-22 19:03:03,261 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1169 transitions. Word has length 61 [2020-12-22 19:03:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:03,261 INFO L481 AbstractCegarLoop]: Abstraction has 1046 states and 1169 transitions. [2020-12-22 19:03:03,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:03:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1169 transitions. [2020-12-22 19:03:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 19:03:03,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:03,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:03,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:03,477 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1739829774, now seen corresponding path program 9 times [2020-12-22 19:03:03,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:03,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951048497] [2020-12-22 19:03:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:03,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951048497] [2020-12-22 19:03:03,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575379702] [2020-12-22 19:03:03,977 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:04,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:03:04,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:04,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 19:03:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:04,146 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:04,147 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:03:04,148 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:04,197 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-22 19:03:04,200 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:04,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:03:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:05,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:05,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2020-12-22 19:03:05,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932176966] [2020-12-22 19:03:05,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:03:05,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:03:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:03:05,371 INFO L87 Difference]: Start difference. First operand 1046 states and 1169 transitions. Second operand 35 states. [2020-12-22 19:03:08,426 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-12-22 19:03:08,604 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-12-22 19:03:08,796 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-12-22 19:03:08,985 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-12-22 19:03:09,368 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-12-22 19:03:09,788 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-12-22 19:03:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:10,566 INFO L93 Difference]: Finished difference Result 1499 states and 1625 transitions. [2020-12-22 19:03:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:03:10,567 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2020-12-22 19:03:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:10,572 INFO L225 Difference]: With dead ends: 1499 [2020-12-22 19:03:10,572 INFO L226 Difference]: Without dead ends: 1462 [2020-12-22 19:03:10,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:03:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-12-22 19:03:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1052. [2020-12-22 19:03:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2020-12-22 19:03:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1175 transitions. [2020-12-22 19:03:10,584 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1175 transitions. Word has length 62 [2020-12-22 19:03:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:10,584 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1175 transitions. [2020-12-22 19:03:10,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:03:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1175 transitions. [2020-12-22 19:03:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 19:03:10,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:10,586 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:10,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 19:03:10,787 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:10,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:10,788 INFO L82 PathProgramCache]: Analyzing trace with hash -983535333, now seen corresponding path program 10 times [2020-12-22 19:03:10,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:10,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984708800] [2020-12-22 19:03:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:11,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984708800] [2020-12-22 19:03:11,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752852068] [2020-12-22 19:03:11,338 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:11,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:03:11,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-22 19:03:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:11,493 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_49|], 1=[|v_#valid_35|]} [2020-12-22 19:03:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:11,502 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:03:11,503 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:11,525 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:11,534 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-22 19:03:11,536 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:11,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:11,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:11,555 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:16 [2020-12-22 19:03:11,676 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:03:11,681 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:11,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:11,698 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:11,698 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-12-22 19:03:11,897 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:11,897 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 19:03:11,899 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:03:11,929 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:11,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:03:11,933 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 19:03:11,935 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:11,935 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:44 [2020-12-22 19:03:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 19:03:13,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:13,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2020-12-22 19:03:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208165786] [2020-12-22 19:03:13,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:03:13,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:03:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=987, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:03:13,118 INFO L87 Difference]: Start difference. First operand 1052 states and 1175 transitions. Second operand 33 states. [2020-12-22 19:03:17,758 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-22 19:03:18,101 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 19:03:18,409 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 19:03:18,726 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-22 19:03:19,094 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 19:03:19,331 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 19:03:19,981 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 19:03:21,272 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 19:03:21,548 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-22 19:03:21,765 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-22 19:03:21,979 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47