/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/loop-acceleration/array3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:40:41,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:40:41,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:40:41,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:40:41,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:40:41,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:40:41,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:40:41,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:40:41,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:40:41,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:40:41,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:40:41,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:40:41,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:40:41,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:40:41,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:40:41,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:40:41,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:40:41,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:40:41,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:40:41,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:40:41,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:40:41,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:40:41,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:40:41,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:40:41,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:40:41,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:40:41,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:40:41,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:40:41,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:40:41,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:40:41,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:40:41,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:40:41,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:40:41,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:40:41,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:40:41,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:40:41,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:40:41,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:40:41,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:40:41,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:40:41,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:40:41,494 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:40:41,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:40:41,495 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:40:41,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:40:41,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:40:41,496 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:40:41,497 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:40:41,497 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:40:41,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:40:41,498 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:40:41,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:40:41,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:40:41,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:40:41,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:40:41,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:40:41,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:40:41,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:40:41,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:40:41,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:40:41,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:40:41,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:40:42,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:40:42,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:40:42,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:40:42,045 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:40:42,046 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:40:42,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array3.i [2020-12-22 19:40:42,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01648fe5d/c35f0ba41998483aba7a34db82258a00/FLAG8f0519d98 [2020-12-22 19:40:42,939 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:40:42,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i [2020-12-22 19:40:42,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01648fe5d/c35f0ba41998483aba7a34db82258a00/FLAG8f0519d98 [2020-12-22 19:40:43,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01648fe5d/c35f0ba41998483aba7a34db82258a00 [2020-12-22 19:40:43,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:40:43,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:40:43,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:40:43,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:40:43,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:40:43,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@797f606e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43, skipping insertion in model container [2020-12-22 19:40:43,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:40:43,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:40:43,525 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2020-12-22 19:40:43,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:40:43,564 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:40:43,583 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2020-12-22 19:40:43,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:40:43,616 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:40:43,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43 WrapperNode [2020-12-22 19:40:43,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:40:43,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:40:43,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:40:43,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:40:43,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:40:43,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:40:43,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:40:43,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:40:43,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 19:40:43,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:40:43,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:40:43,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:40:43,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:40:43,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (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 19:40:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:40:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:40:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:40:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:40:43,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:40:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:40:43,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:40:44,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:40:44,267 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 19:40:44,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:40:44 BoogieIcfgContainer [2020-12-22 19:40:44,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:40:44,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:40:44,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:40:44,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:40:44,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:40:43" (1/3) ... [2020-12-22 19:40:44,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eda36aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:40:44, skipping insertion in model container [2020-12-22 19:40:44,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (2/3) ... [2020-12-22 19:40:44,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eda36aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:40:44, skipping insertion in model container [2020-12-22 19:40:44,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:40:44" (3/3) ... [2020-12-22 19:40:44,306 INFO L111 eAbstractionObserver]: Analyzing ICFG array3.i [2020-12-22 19:40:44,319 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:40:44,329 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-22 19:40:44,359 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-22 19:40:44,393 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:40:44,394 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:40:44,394 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:40:44,394 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:40:44,394 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:40:44,394 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:40:44,394 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:40:44,395 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:40:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-22 19:40:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:40:44,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:44,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:40:44,417 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:44,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:44,423 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-22 19:40:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:44,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257608684] [2020-12-22 19:40:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:44,618 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 19:40:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257608684] [2020-12-22 19:40:44,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:40:44,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:40:44,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713581347] [2020-12-22 19:40:44,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:40:44,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:40:44,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:40:44,650 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-22 19:40:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:44,702 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-22 19:40:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:40:44,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:40:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:44,718 INFO L225 Difference]: With dead ends: 22 [2020-12-22 19:40:44,718 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 19:40:44,726 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 19:40:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 19:40:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 19:40:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 19:40:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 19:40:44,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2020-12-22 19:40:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:44,768 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 19:40:44,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:40:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 19:40:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:40:44,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:44,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:40:44,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:40:44,771 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-22 19:40:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:44,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746549661] [2020-12-22 19:40:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:44,860 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 19:40:44,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746549661] [2020-12-22 19:40:44,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:40:44,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:40:44,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968828851] [2020-12-22 19:40:44,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:40:44,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:44,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:40:44,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:40:44,866 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2020-12-22 19:40:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:44,943 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 19:40:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:40:44,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:40:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:44,945 INFO L225 Difference]: With dead ends: 24 [2020-12-22 19:40:44,945 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 19:40:44,946 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 19:40:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 19:40:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-22 19:40:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 19:40:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 19:40:44,951 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2020-12-22 19:40:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:44,951 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 19:40:44,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:40:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 19:40:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:40:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:44,952 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 19:40:44,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:40:44,953 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:44,954 INFO L82 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2020-12-22 19:40:44,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:44,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025231405] [2020-12-22 19:40:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:45,085 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 19:40:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025231405] [2020-12-22 19:40:45,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740439466] [2020-12-22 19:40:45,086 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 19:40:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:40:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:45,225 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:40:45,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:40:45,238 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:40:45,239 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:40:45,240 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:40:45,281 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 19:40:45,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:45,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-22 19:40:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508640660] [2020-12-22 19:40:45,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:40:45,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:40:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:40:45,284 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-12-22 19:40:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:45,437 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-22 19:40:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:40:45,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 19:40:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:45,440 INFO L225 Difference]: With dead ends: 47 [2020-12-22 19:40:45,440 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:40:45,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:40:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:40:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-12-22 19:40:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 19:40:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-22 19:40:45,447 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 8 [2020-12-22 19:40:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:45,447 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-22 19:40:45,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:40:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-22 19:40:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:40:45,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:45,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:40:45,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 19:40:45,665 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash -988350449, now seen corresponding path program 1 times [2020-12-22 19:40:45,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:45,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014817847] [2020-12-22 19:40:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:40:45,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014817847] [2020-12-22 19:40:45,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:40:45,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:40:45,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66356347] [2020-12-22 19:40:45,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:40:45,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:40:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:40:45,748 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 4 states. [2020-12-22 19:40:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:45,815 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-22 19:40:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:40:45,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-22 19:40:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:45,818 INFO L225 Difference]: With dead ends: 42 [2020-12-22 19:40:45,818 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 19:40:45,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 19:40:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 19:40:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-12-22 19:40:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 19:40:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-22 19:40:45,824 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 21 [2020-12-22 19:40:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:45,825 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-22 19:40:45,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:40:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-22 19:40:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 19:40:45,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:45,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:40:45,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:40:45,827 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash -574087801, now seen corresponding path program 1 times [2020-12-22 19:40:45,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:45,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188555974] [2020-12-22 19:40:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:40:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188555974] [2020-12-22 19:40:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919255374] [2020-12-22 19:40:45,921 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 19:40:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:46,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 19:40:46,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:40:46,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:46,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 19:40:46,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851912899] [2020-12-22 19:40:46,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:40:46,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:40:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:40:46,095 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 7 states. [2020-12-22 19:40:46,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:46,204 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-12-22 19:40:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:40:46,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-22 19:40:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:46,207 INFO L225 Difference]: With dead ends: 78 [2020-12-22 19:40:46,207 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 19:40:46,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:40:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 19:40:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2020-12-22 19:40:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:40:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-22 19:40:46,215 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 22 [2020-12-22 19:40:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:46,215 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-22 19:40:46,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:40:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-22 19:40:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:40:46,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:46,216 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:40:46,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:46,428 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash -383321270, now seen corresponding path program 2 times [2020-12-22 19:40:46,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:46,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516170085] [2020-12-22 19:40:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:40:46,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516170085] [2020-12-22 19:40:46,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850555174] [2020-12-22 19:40:46,534 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 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 19:40:46,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:40:46,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:40:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:40:46,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:40:46,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 19:40:46,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987040694] [2020-12-22 19:40:46,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:40:46,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:40:46,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:40:46,787 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-12-22 19:40:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:46,823 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-12-22 19:40:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:40:46,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-22 19:40:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:46,825 INFO L225 Difference]: With dead ends: 42 [2020-12-22 19:40:46,826 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 19:40:46,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:40:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 19:40:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 19:40:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 19:40:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 19:40:46,832 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 26 [2020-12-22 19:40:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:46,832 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 19:40:46,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:40:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 19:40:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:40:46,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:46,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:40:47,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:47,047 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:47,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1416380605, now seen corresponding path program 1 times [2020-12-22 19:40:47,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:47,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113543241] [2020-12-22 19:40:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:40:47,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113543241] [2020-12-22 19:40:47,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197729056] [2020-12-22 19:40:47,123 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 19:40:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:40:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:40:47,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:47,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2020-12-22 19:40:47,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596432299] [2020-12-22 19:40:47,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:40:47,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:47,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:40:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:40:47,324 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 9 states. [2020-12-22 19:40:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:47,567 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-12-22 19:40:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:40:47,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-22 19:40:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:47,569 INFO L225 Difference]: With dead ends: 66 [2020-12-22 19:40:47,569 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 19:40:47,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:40:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 19:40:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-12-22 19:40:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:40:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-12-22 19:40:47,577 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 29 [2020-12-22 19:40:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:47,577 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-12-22 19:40:47,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:40:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-12-22 19:40:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:40:47,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:47,579 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:40:47,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:47,794 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:47,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1132990271, now seen corresponding path program 1 times [2020-12-22 19:40:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:47,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708725035] [2020-12-22 19:40:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:40:47,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708725035] [2020-12-22 19:40:47,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910294660] [2020-12-22 19:40:47,927 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 19:40:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:48,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:40:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:40:48,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:48,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 19:40:48,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242775768] [2020-12-22 19:40:48,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:40:48,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:48,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:40:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:40:48,122 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 9 states. [2020-12-22 19:40:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:48,264 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-12-22 19:40:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:40:48,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-12-22 19:40:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:48,266 INFO L225 Difference]: With dead ends: 71 [2020-12-22 19:40:48,267 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 19:40:48,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:40:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 19:40:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-12-22 19:40:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 19:40:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-12-22 19:40:48,273 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2020-12-22 19:40:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:48,274 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-12-22 19:40:48,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:40:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-12-22 19:40:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 19:40:48,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:48,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:40:48,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:48,490 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2013301602, now seen corresponding path program 2 times [2020-12-22 19:40:48,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:48,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100836581] [2020-12-22 19:40:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:40:48,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100836581] [2020-12-22 19:40:48,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266136103] [2020-12-22 19:40:48,652 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 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 19:40:48,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:40:48,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:40:48,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:40:48,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:48,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 19:40:48,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132154841] [2020-12-22 19:40:48,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:40:48,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:40:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:40:48,786 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 10 states. [2020-12-22 19:40:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:48,900 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-12-22 19:40:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:40:48,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-12-22 19:40:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:48,902 INFO L225 Difference]: With dead ends: 84 [2020-12-22 19:40:48,902 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 19:40:48,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:40:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 19:40:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2020-12-22 19:40:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:40:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-22 19:40:48,908 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 41 [2020-12-22 19:40:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:48,909 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-22 19:40:48,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:40:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-22 19:40:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:40:48,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:48,911 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:40:49,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:49,126 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2050474491, now seen corresponding path program 3 times [2020-12-22 19:40:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:49,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470618800] [2020-12-22 19:40:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:40:49,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470618800] [2020-12-22 19:40:49,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778269001] [2020-12-22 19:40:49,263 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 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 19:40:49,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:40:49,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:40:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:49,341 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:40:49,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:40:49,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:40:49,347 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:40:49,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:40:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:40:49,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:49,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2020-12-22 19:40:49,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748397028] [2020-12-22 19:40:49,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:40:49,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:40:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:40:49,547 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 17 states. [2020-12-22 19:40:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:49,862 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-12-22 19:40:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:40:49,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-12-22 19:40:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:49,865 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:40:49,865 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:40:49,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:40:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:40:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2020-12-22 19:40:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 19:40:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-12-22 19:40:49,873 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 45 [2020-12-22 19:40:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:49,873 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-12-22 19:40:49,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:40:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-12-22 19:40:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:40:49,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:49,875 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-22 19:40:50,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:40:50,091 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1299221260, now seen corresponding path program 4 times [2020-12-22 19:40:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:50,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885526631] [2020-12-22 19:40:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:40:50,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885526631] [2020-12-22 19:40:50,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165375940] [2020-12-22 19:40:50,283 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 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 19:40:50,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:40:50,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:50,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:40:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:40:50,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:50,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 19:40:50,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267954058] [2020-12-22 19:40:50,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:40:50,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:50,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:40:50,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:40:50,461 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 13 states. [2020-12-22 19:40:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:50,597 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2020-12-22 19:40:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:40:50,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-12-22 19:40:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:50,599 INFO L225 Difference]: With dead ends: 122 [2020-12-22 19:40:50,599 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 19:40:50,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:40:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 19:40:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 71. [2020-12-22 19:40:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 19:40:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-12-22 19:40:50,605 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 57 [2020-12-22 19:40:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:50,605 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-12-22 19:40:50,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:40:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-12-22 19:40:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:40:50,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:50,607 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-22 19:40:50,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 19:40:50,822 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash 891584105, now seen corresponding path program 5 times [2020-12-22 19:40:50,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:50,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349980377] [2020-12-22 19:40:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:40:50,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349980377] [2020-12-22 19:40:50,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293060197] [2020-12-22 19:40:50,965 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 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 19:40:51,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 19:40:51,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:40:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:40:51,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:51,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 19:40:51,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987991746] [2020-12-22 19:40:51,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:40:51,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:51,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:40:51,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:40:51,201 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2020-12-22 19:40:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:51,342 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2020-12-22 19:40:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:40:51,343 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-12-22 19:40:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:51,344 INFO L225 Difference]: With dead ends: 135 [2020-12-22 19:40:51,344 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 19:40:51,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:40:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 19:40:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 75. [2020-12-22 19:40:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:40:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-12-22 19:40:51,349 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 61 [2020-12-22 19:40:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:51,350 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-12-22 19:40:51,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:40:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-12-22 19:40:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 19:40:51,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:51,351 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-22 19:40:51,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:51,566 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1891990342, now seen corresponding path program 6 times [2020-12-22 19:40:51,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:51,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359729579] [2020-12-22 19:40:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:40:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359729579] [2020-12-22 19:40:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094338248] [2020-12-22 19:40:51,781 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 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 19:40:51,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 19:40:51,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:40:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:51,902 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:40:51,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:40:51,907 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:40:51,907 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:40:51,908 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:40:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 19:40:52,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:52,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 20 [2020-12-22 19:40:52,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585269974] [2020-12-22 19:40:52,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:40:52,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:40:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:40:52,126 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 20 states. [2020-12-22 19:40:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:52,520 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2020-12-22 19:40:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:40:52,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-12-22 19:40:52,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:52,522 INFO L225 Difference]: With dead ends: 141 [2020-12-22 19:40:52,522 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 19:40:52,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:40:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 19:40:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2020-12-22 19:40:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 19:40:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-22 19:40:52,533 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 65 [2020-12-22 19:40:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:52,534 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-22 19:40:52,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:40:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-22 19:40:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 19:40:52,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:52,535 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-22 19:40:52,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:52,749 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1196797050, now seen corresponding path program 7 times [2020-12-22 19:40:52,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:52,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194245899] [2020-12-22 19:40:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:40:52,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194245899] [2020-12-22 19:40:52,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046187106] [2020-12-22 19:40:52,969 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 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 19:40:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:40:53,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:40:53,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:53,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 19:40:53,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445612291] [2020-12-22 19:40:53,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:40:53,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:53,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:40:53,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:40:53,157 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 16 states. [2020-12-22 19:40:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:53,322 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2020-12-22 19:40:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:40:53,323 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-12-22 19:40:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:53,324 INFO L225 Difference]: With dead ends: 160 [2020-12-22 19:40:53,324 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 19:40:53,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:40:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 19:40:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 83. [2020-12-22 19:40:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 19:40:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-12-22 19:40:53,329 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 73 [2020-12-22 19:40:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:53,329 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-12-22 19:40:53,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:40:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-12-22 19:40:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:40:53,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:53,331 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-22 19:40:53,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:40:53,545 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:53,546 INFO L82 PathProgramCache]: Analyzing trace with hash -193378857, now seen corresponding path program 8 times [2020-12-22 19:40:53,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:53,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929975960] [2020-12-22 19:40:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:40:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929975960] [2020-12-22 19:40:53,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658238628] [2020-12-22 19:40:53,753 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 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 19:40:53,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:40:53,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:40:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:40:53,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:53,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 19:40:53,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914508322] [2020-12-22 19:40:53,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:40:53,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:40:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:40:53,953 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 17 states. [2020-12-22 19:40:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:54,144 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2020-12-22 19:40:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:40:54,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-12-22 19:40:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:54,146 INFO L225 Difference]: With dead ends: 173 [2020-12-22 19:40:54,146 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 19:40:54,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:40:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 19:40:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 87. [2020-12-22 19:40:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 19:40:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-22 19:40:54,154 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 77 [2020-12-22 19:40:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:54,155 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-22 19:40:54,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:40:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-22 19:40:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 19:40:54,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:54,156 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-22 19:40:54,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:40:54,370 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:54,371 INFO L82 PathProgramCache]: Analyzing trace with hash -918099788, now seen corresponding path program 9 times [2020-12-22 19:40:54,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:54,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684395562] [2020-12-22 19:40:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:40:54,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684395562] [2020-12-22 19:40:54,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011271958] [2020-12-22 19:40:54,617 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 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 19:40:54,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 19:40:54,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:54,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:40:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:54,712 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:40:54,713 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:40:54,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:40:54,718 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:40:54,719 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:40:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 53 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-22 19:40:55,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:55,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2020-12-22 19:40:55,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063135632] [2020-12-22 19:40:55,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:40:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:55,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:40:55,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=400, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:40:55,021 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 26 states. [2020-12-22 19:40:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:55,681 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-12-22 19:40:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 19:40:55,681 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-12-22 19:40:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:55,683 INFO L225 Difference]: With dead ends: 179 [2020-12-22 19:40:55,683 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 19:40:55,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=800, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:40:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 19:40:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 98. [2020-12-22 19:40:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 19:40:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-12-22 19:40:55,688 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 81 [2020-12-22 19:40:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:55,688 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-12-22 19:40:55,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:40:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-12-22 19:40:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 19:40:55,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:55,690 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:40:55,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:40:55,906 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:55,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1695794939, now seen corresponding path program 2 times [2020-12-22 19:40:55,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:55,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674507578] [2020-12-22 19:40:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-22 19:40:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674507578] [2020-12-22 19:40:56,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:40:56,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:40:56,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514285125] [2020-12-22 19:40:56,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:40:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:40:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:40:56,050 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 5 states. [2020-12-22 19:40:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:56,080 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-12-22 19:40:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:40:56,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 19:40:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:56,082 INFO L225 Difference]: With dead ends: 96 [2020-12-22 19:40:56,082 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 19:40:56,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:40:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 19:40:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-22 19:40:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 19:40:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-22 19:40:56,085 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 93 [2020-12-22 19:40:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:56,086 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-22 19:40:56,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:40:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-22 19:40:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 19:40:56,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:56,087 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-22 19:40:56,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 19:40:56,088 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:56,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:56,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1695848517, now seen corresponding path program 10 times [2020-12-22 19:40:56,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:56,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490444008] [2020-12-22 19:40:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:40:56,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490444008] [2020-12-22 19:40:56,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059461430] [2020-12-22 19:40:56,336 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 19:40:56,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:40:56,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 19:40:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:40:56,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:56,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 19:40:56,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023103308] [2020-12-22 19:40:56,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:40:56,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:40:56,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:40:56,768 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 20 states. [2020-12-22 19:40:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:56,964 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2020-12-22 19:40:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:40:56,964 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-12-22 19:40:56,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:56,965 INFO L225 Difference]: With dead ends: 159 [2020-12-22 19:40:56,965 INFO L226 Difference]: Without dead ends: 159 [2020-12-22 19:40:56,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:40:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-22 19:40:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 98. [2020-12-22 19:40:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 19:40:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-12-22 19:40:56,989 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2020-12-22 19:40:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:56,990 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-12-22 19:40:56,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:40:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-12-22 19:40:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 19:40:56,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:56,991 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-22 19:40:57,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:57,205 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash 553836834, now seen corresponding path program 11 times [2020-12-22 19:40:57,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:57,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533473414] [2020-12-22 19:40:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:40:57,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533473414] [2020-12-22 19:40:57,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159247948] [2020-12-22 19:40:57,481 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 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 19:40:57,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 19:40:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:40:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:40:57,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:57,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 19:40:57,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871370866] [2020-12-22 19:40:57,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:40:57,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:40:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:40:57,843 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 21 states. [2020-12-22 19:40:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:40:58,097 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2020-12-22 19:40:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 19:40:58,098 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-12-22 19:40:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:40:58,100 INFO L225 Difference]: With dead ends: 168 [2020-12-22 19:40:58,100 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 19:40:58,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:40:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 19:40:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 102. [2020-12-22 19:40:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 19:40:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-12-22 19:40:58,105 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2020-12-22 19:40:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:40:58,105 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-12-22 19:40:58,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:40:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-12-22 19:40:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 19:40:58,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:40:58,106 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-22 19:40:58,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:40:58,313 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:40:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:40:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash 951546751, now seen corresponding path program 12 times [2020-12-22 19:40:58,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:40:58,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765561185] [2020-12-22 19:40:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:40:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:40:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:40:58,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765561185] [2020-12-22 19:40:58,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204993860] [2020-12-22 19:40:58,609 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 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 19:40:58,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 19:40:58,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:40:58,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:40:58,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:40:58,811 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:40:58,811 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:40:58,815 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:40:58,816 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:40:58,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:40:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 69 proven. 66 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-12-22 19:40:59,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:40:59,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 31 [2020-12-22 19:40:59,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945901300] [2020-12-22 19:40:59,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:40:59,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:40:59,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:40:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=564, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:40:59,118 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 31 states. [2020-12-22 19:41:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:00,140 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2020-12-22 19:41:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:41:00,144 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2020-12-22 19:41:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:00,145 INFO L225 Difference]: With dead ends: 167 [2020-12-22 19:41:00,145 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 19:41:00,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=691, Invalid=1201, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:41:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 19:41:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-12-22 19:41:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 19:41:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-12-22 19:41:00,150 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 101 [2020-12-22 19:41:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:00,151 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-12-22 19:41:00,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:41:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-12-22 19:41:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 19:41:00,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:00,152 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-22 19:41:00,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:41:00,367 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash -241703792, now seen corresponding path program 13 times [2020-12-22 19:41:00,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:00,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112767869] [2020-12-22 19:41:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:41:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112767869] [2020-12-22 19:41:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368550402] [2020-12-22 19:41:00,807 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 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 19:41:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:00,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 19:41:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:41:01,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:01,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 19:41:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608015374] [2020-12-22 19:41:01,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:41:01,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:01,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:41:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:41:01,150 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2020-12-22 19:41:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:01,459 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2020-12-22 19:41:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:41:01,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-12-22 19:41:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:01,461 INFO L225 Difference]: With dead ends: 194 [2020-12-22 19:41:01,461 INFO L226 Difference]: Without dead ends: 194 [2020-12-22 19:41:01,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:41:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-22 19:41:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 118. [2020-12-22 19:41:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 19:41:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-12-22 19:41:01,467 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2020-12-22 19:41:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:01,467 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-12-22 19:41:01,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:41:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-12-22 19:41:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 19:41:01,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:01,468 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-22 19:41:01,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 19:41:01,683 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:01,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1335762157, now seen corresponding path program 14 times [2020-12-22 19:41:01,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:01,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856585076] [2020-12-22 19:41:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:41:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856585076] [2020-12-22 19:41:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687273273] [2020-12-22 19:41:02,138 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 19:41:02,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:41:02,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:02,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 19:41:02,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:41:02,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:02,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 19:41:02,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993363513] [2020-12-22 19:41:02,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:41:02,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:41:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:41:02,427 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 25 states. [2020-12-22 19:41:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:02,732 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2020-12-22 19:41:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:41:02,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2020-12-22 19:41:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:02,737 INFO L225 Difference]: With dead ends: 203 [2020-12-22 19:41:02,737 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 19:41:02,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:41:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 19:41:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 122. [2020-12-22 19:41:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-22 19:41:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-12-22 19:41:02,742 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 117 [2020-12-22 19:41:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:02,742 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-12-22 19:41:02,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:41:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-12-22 19:41:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 19:41:02,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:02,743 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-22 19:41:02,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:41:02,955 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:02,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1424416458, now seen corresponding path program 15 times [2020-12-22 19:41:02,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:02,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693873940] [2020-12-22 19:41:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:41:03,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693873940] [2020-12-22 19:41:03,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594326751] [2020-12-22 19:41:03,425 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 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 19:41:03,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 19:41:03,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:03,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:41:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:03,524 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:41:03,525 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:41:03,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:41:03,530 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:41:03,530 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:41:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 85 proven. 91 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2020-12-22 19:41:03,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:03,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 36 [2020-12-22 19:41:03,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445123228] [2020-12-22 19:41:03,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:41:03,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:41:03,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=755, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:41:03,931 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 36 states. [2020-12-22 19:41:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:05,297 INFO L93 Difference]: Finished difference Result 199 states and 215 transitions. [2020-12-22 19:41:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:41:05,298 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 121 [2020-12-22 19:41:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:05,300 INFO L225 Difference]: With dead ends: 199 [2020-12-22 19:41:05,300 INFO L226 Difference]: Without dead ends: 199 [2020-12-22 19:41:05,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=969, Invalid=1683, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:41:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-22 19:41:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2020-12-22 19:41:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 19:41:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-12-22 19:41:05,307 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 121 [2020-12-22 19:41:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:05,307 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-12-22 19:41:05,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:41:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-12-22 19:41:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 19:41:05,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:05,308 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-22 19:41:05,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:41:05,522 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1850715813, now seen corresponding path program 16 times [2020-12-22 19:41:05,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:05,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681582333] [2020-12-22 19:41:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:41:06,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681582333] [2020-12-22 19:41:06,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943728099] [2020-12-22 19:41:06,065 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 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 19:41:06,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:41:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:41:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:41:06,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:06,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 19:41:06,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785495425] [2020-12-22 19:41:06,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:41:06,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:41:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:41:06,737 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 28 states. [2020-12-22 19:41:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:07,115 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2020-12-22 19:41:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:41:07,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 133 [2020-12-22 19:41:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:07,118 INFO L225 Difference]: With dead ends: 229 [2020-12-22 19:41:07,118 INFO L226 Difference]: Without dead ends: 229 [2020-12-22 19:41:07,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:41:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-22 19:41:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 138. [2020-12-22 19:41:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 19:41:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-12-22 19:41:07,123 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 133 [2020-12-22 19:41:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:07,124 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-12-22 19:41:07,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:41:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-12-22 19:41:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 19:41:07,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:07,125 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-22 19:41:07,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:41:07,339 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1174685384, now seen corresponding path program 17 times [2020-12-22 19:41:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:07,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011311508] [2020-12-22 19:41:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:41:07,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011311508] [2020-12-22 19:41:07,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380246737] [2020-12-22 19:41:07,882 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 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 19:41:08,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-22 19:41:08,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 19:41:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:41:08,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:08,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 19:41:08,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556674561] [2020-12-22 19:41:08,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:41:08,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:41:08,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:41:08,720 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 29 states. [2020-12-22 19:41:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:09,132 INFO L93 Difference]: Finished difference Result 238 states and 239 transitions. [2020-12-22 19:41:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:41:09,133 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2020-12-22 19:41:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:09,135 INFO L225 Difference]: With dead ends: 238 [2020-12-22 19:41:09,135 INFO L226 Difference]: Without dead ends: 238 [2020-12-22 19:41:09,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:41:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-22 19:41:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 142. [2020-12-22 19:41:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 19:41:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-12-22 19:41:09,141 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2020-12-22 19:41:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:09,142 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-12-22 19:41:09,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:41:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-12-22 19:41:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 19:41:09,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:09,143 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-22 19:41:09,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:41:09,358 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2087053973, now seen corresponding path program 18 times [2020-12-22 19:41:09,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:09,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425851090] [2020-12-22 19:41:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:41:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425851090] [2020-12-22 19:41:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595256265] [2020-12-22 19:41:09,992 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 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 19:41:10,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 19:41:10,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 19:41:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:10,522 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:41:10,523 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:41:10,527 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:41:10,528 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:41:10,528 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:41:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 101 proven. 120 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-22 19:41:11,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:11,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 41 [2020-12-22 19:41:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331054771] [2020-12-22 19:41:11,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 19:41:11,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 19:41:11,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=973, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:41:11,030 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 41 states. [2020-12-22 19:41:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:12,636 INFO L93 Difference]: Finished difference Result 231 states and 250 transitions. [2020-12-22 19:41:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 19:41:12,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2020-12-22 19:41:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:12,638 INFO L225 Difference]: With dead ends: 231 [2020-12-22 19:41:12,638 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 19:41:12,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1294, Invalid=2246, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:41:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 19:41:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 154. [2020-12-22 19:41:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 19:41:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-12-22 19:41:12,644 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 141 [2020-12-22 19:41:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:12,644 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-12-22 19:41:12,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 19:41:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-12-22 19:41:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 19:41:12,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:12,645 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-22 19:41:12,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:41:12,859 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:12,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:12,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2024890714, now seen corresponding path program 19 times [2020-12-22 19:41:12,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:12,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251469374] [2020-12-22 19:41:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 19:41:13,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251469374] [2020-12-22 19:41:13,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088992990] [2020-12-22 19:41:13,528 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 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 19:41:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:41:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 19:41:13,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:13,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 19:41:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065355989] [2020-12-22 19:41:13,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:41:13,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:41:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:41:13,839 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 32 states. [2020-12-22 19:41:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:14,260 INFO L93 Difference]: Finished difference Result 264 states and 265 transitions. [2020-12-22 19:41:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 19:41:14,260 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 153 [2020-12-22 19:41:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:14,262 INFO L225 Difference]: With dead ends: 264 [2020-12-22 19:41:14,262 INFO L226 Difference]: Without dead ends: 264 [2020-12-22 19:41:14,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:41:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-22 19:41:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 158. [2020-12-22 19:41:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 19:41:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2020-12-22 19:41:14,267 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 153 [2020-12-22 19:41:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:14,268 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2020-12-22 19:41:14,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:41:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2020-12-22 19:41:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 19:41:14,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:14,269 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-22 19:41:14,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 19:41:14,485 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash 116160003, now seen corresponding path program 20 times [2020-12-22 19:41:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:14,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151095210] [2020-12-22 19:41:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 19:41:15,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151095210] [2020-12-22 19:41:15,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106731689] [2020-12-22 19:41:15,131 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 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 19:41:15,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:41:15,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:41:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 19:41:15,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:15,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 19:41:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354973759] [2020-12-22 19:41:15,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:41:15,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:41:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:41:15,439 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 33 states. [2020-12-22 19:41:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:15,882 INFO L93 Difference]: Finished difference Result 273 states and 274 transitions. [2020-12-22 19:41:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 19:41:15,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2020-12-22 19:41:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:15,884 INFO L225 Difference]: With dead ends: 273 [2020-12-22 19:41:15,884 INFO L226 Difference]: Without dead ends: 273 [2020-12-22 19:41:15,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:41:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-22 19:41:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 162. [2020-12-22 19:41:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 19:41:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-12-22 19:41:15,890 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 157 [2020-12-22 19:41:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:15,890 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-12-22 19:41:15,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:41:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-12-22 19:41:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 19:41:15,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:15,892 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-22 19:41:16,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:41:16,107 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1256543968, now seen corresponding path program 21 times [2020-12-22 19:41:16,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:16,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653139657] [2020-12-22 19:41:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 19:41:16,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653139657] [2020-12-22 19:41:16,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378699858] [2020-12-22 19:41:16,817 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 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 19:41:16,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 19:41:16,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:41:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:16,947 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:41:16,948 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:41:16,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:41:16,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:41:16,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:41:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 117 proven. 153 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2020-12-22 19:41:17,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:17,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14] total 46 [2020-12-22 19:41:17,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245169823] [2020-12-22 19:41:17,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 19:41:17,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 19:41:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=1218, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:41:17,472 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 46 states. [2020-12-22 19:41:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:19,391 INFO L93 Difference]: Finished difference Result 263 states and 285 transitions. [2020-12-22 19:41:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 19:41:19,392 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 161 [2020-12-22 19:41:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:19,394 INFO L225 Difference]: With dead ends: 263 [2020-12-22 19:41:19,394 INFO L226 Difference]: Without dead ends: 263 [2020-12-22 19:41:19,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1666, Invalid=2890, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 19:41:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-22 19:41:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 174. [2020-12-22 19:41:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 19:41:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-12-22 19:41:19,401 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 161 [2020-12-22 19:41:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:19,401 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-12-22 19:41:19,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 19:41:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-12-22 19:41:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 19:41:19,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:19,403 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-22 19:41:19,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:41:19,617 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:19,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:19,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1636011121, now seen corresponding path program 22 times [2020-12-22 19:41:19,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:19,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530886359] [2020-12-22 19:41:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 19:41:20,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530886359] [2020-12-22 19:41:20,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433430887] [2020-12-22 19:41:20,422 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 19:41:21,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:41:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:41:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 19:41:21,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:21,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 19:41:21,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028398083] [2020-12-22 19:41:21,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:41:21,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:41:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:41:21,997 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 36 states. [2020-12-22 19:41:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:22,530 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2020-12-22 19:41:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 19:41:22,531 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 173 [2020-12-22 19:41:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:22,533 INFO L225 Difference]: With dead ends: 299 [2020-12-22 19:41:22,533 INFO L226 Difference]: Without dead ends: 299 [2020-12-22 19:41:22,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:41:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-22 19:41:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 178. [2020-12-22 19:41:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 19:41:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2020-12-22 19:41:22,542 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2020-12-22 19:41:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:22,543 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2020-12-22 19:41:22,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:41:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2020-12-22 19:41:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-22 19:41:22,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:22,544 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-22 19:41:22,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:41:22,756 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:22,757 INFO L82 PathProgramCache]: Analyzing trace with hash -94301362, now seen corresponding path program 23 times [2020-12-22 19:41:22,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:22,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232971030] [2020-12-22 19:41:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 19:41:23,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232971030] [2020-12-22 19:41:23,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754751679] [2020-12-22 19:41:23,724 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 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 19:41:25,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-22 19:41:25,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 19:41:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 19:41:25,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:25,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 19:41:25,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130702641] [2020-12-22 19:41:25,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:41:25,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:25,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:41:25,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:41:25,806 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 37 states. [2020-12-22 19:41:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:26,307 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2020-12-22 19:41:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 19:41:26,308 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 177 [2020-12-22 19:41:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:26,309 INFO L225 Difference]: With dead ends: 308 [2020-12-22 19:41:26,309 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 19:41:26,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:41:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 19:41:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 182. [2020-12-22 19:41:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 19:41:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-12-22 19:41:26,314 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 177 [2020-12-22 19:41:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:26,314 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-12-22 19:41:26,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:41:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-12-22 19:41:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-22 19:41:26,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:26,316 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-22 19:41:26,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 19:41:26,532 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1228268459, now seen corresponding path program 24 times [2020-12-22 19:41:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:26,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799306003] [2020-12-22 19:41:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 19:41:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799306003] [2020-12-22 19:41:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363644961] [2020-12-22 19:41:27,424 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 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 19:41:29,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-22 19:41:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:29,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:41:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 100 proven. 190 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-12-22 19:41:29,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:29,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 52 [2020-12-22 19:41:29,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186103695] [2020-12-22 19:41:29,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 19:41:29,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 19:41:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1518, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:41:29,661 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 52 states. [2020-12-22 19:41:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:32,419 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2020-12-22 19:41:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 19:41:32,419 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 181 [2020-12-22 19:41:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:32,422 INFO L225 Difference]: With dead ends: 320 [2020-12-22 19:41:32,422 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 19:41:32,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3002, Invalid=4830, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 19:41:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 19:41:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 190. [2020-12-22 19:41:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-22 19:41:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-12-22 19:41:32,430 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 181 [2020-12-22 19:41:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:32,430 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-12-22 19:41:32,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 19:41:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-12-22 19:41:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-22 19:41:32,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:32,431 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-22 19:41:32,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:41:32,646 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash -523653665, now seen corresponding path program 25 times [2020-12-22 19:41:32,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:32,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902242782] [2020-12-22 19:41:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 19:41:33,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902242782] [2020-12-22 19:41:33,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294274654] [2020-12-22 19:41:33,589 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 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 19:41:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:41:33,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 19:41:33,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:33,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 19:41:33,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876782103] [2020-12-22 19:41:33,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:41:33,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:41:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:41:33,958 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 39 states. [2020-12-22 19:41:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:34,570 INFO L93 Difference]: Finished difference Result 325 states and 326 transitions. [2020-12-22 19:41:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 19:41:34,571 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 189 [2020-12-22 19:41:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:34,573 INFO L225 Difference]: With dead ends: 325 [2020-12-22 19:41:34,573 INFO L226 Difference]: Without dead ends: 325 [2020-12-22 19:41:34,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:41:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-22 19:41:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 194. [2020-12-22 19:41:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 19:41:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-12-22 19:41:34,580 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 189 [2020-12-22 19:41:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:34,581 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-12-22 19:41:34,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:41:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-12-22 19:41:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-22 19:41:34,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:34,583 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-22 19:41:34,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 19:41:34,798 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1400907076, now seen corresponding path program 26 times [2020-12-22 19:41:34,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:34,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121230974] [2020-12-22 19:41:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 19:41:35,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121230974] [2020-12-22 19:41:35,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62251114] [2020-12-22 19:41:35,828 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 19:41:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:41:35,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:41:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 19:41:36,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:36,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 19:41:36,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13679295] [2020-12-22 19:41:36,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 19:41:36,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:36,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 19:41:36,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:41:36,192 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 40 states. [2020-12-22 19:41:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:36,758 INFO L93 Difference]: Finished difference Result 334 states and 335 transitions. [2020-12-22 19:41:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 19:41:36,759 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 193 [2020-12-22 19:41:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:36,762 INFO L225 Difference]: With dead ends: 334 [2020-12-22 19:41:36,762 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 19:41:36,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:41:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 19:41:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 198. [2020-12-22 19:41:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 19:41:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-12-22 19:41:36,768 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 193 [2020-12-22 19:41:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:36,768 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-12-22 19:41:36,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 19:41:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-12-22 19:41:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-12-22 19:41:36,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:36,770 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-22 19:41:36,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:41:36,983 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash 627724569, now seen corresponding path program 27 times [2020-12-22 19:41:36,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:36,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985843365] [2020-12-22 19:41:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2932 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 19:41:38,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985843365] [2020-12-22 19:41:38,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882173336] [2020-12-22 19:41:38,115 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 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 19:41:38,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 19:41:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:41:38,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:38,273 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:41:38,274 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:41:38,278 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:41:38,278 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:41:38,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:41:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2932 backedges. 145 proven. 231 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2020-12-22 19:41:39,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:39,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 16] total 55 [2020-12-22 19:41:39,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655421094] [2020-12-22 19:41:39,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 19:41:39,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:39,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 19:41:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=1731, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 19:41:39,008 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 55 states. [2020-12-22 19:41:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:41,825 INFO L93 Difference]: Finished difference Result 319 states and 346 transitions. [2020-12-22 19:41:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 19:41:41,825 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 197 [2020-12-22 19:41:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:41,828 INFO L225 Difference]: With dead ends: 319 [2020-12-22 19:41:41,829 INFO L226 Difference]: Without dead ends: 319 [2020-12-22 19:41:41,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2427, Invalid=4215, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 19:41:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-22 19:41:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 210. [2020-12-22 19:41:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 19:41:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2020-12-22 19:41:41,835 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 197 [2020-12-22 19:41:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:41,835 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2020-12-22 19:41:41,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 19:41:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2020-12-22 19:41:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-12-22 19:41:41,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:41,837 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-22 19:41:42,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:41:42,051 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1566560982, now seen corresponding path program 28 times [2020-12-22 19:41:42,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:42,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905048843] [2020-12-22 19:41:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3279 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 19:41:43,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905048843] [2020-12-22 19:41:43,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016040157] [2020-12-22 19:41:43,214 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 19:41:45,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:41:45,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:41:45,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 19:41:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:41:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3279 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 19:41:46,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:41:46,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 19:41:46,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625335017] [2020-12-22 19:41:46,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 19:41:46,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:41:46,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 19:41:46,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:41:46,113 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 43 states. [2020-12-22 19:41:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:41:46,765 INFO L93 Difference]: Finished difference Result 360 states and 361 transitions. [2020-12-22 19:41:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 19:41:46,765 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 209 [2020-12-22 19:41:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:41:46,767 INFO L225 Difference]: With dead ends: 360 [2020-12-22 19:41:46,767 INFO L226 Difference]: Without dead ends: 360 [2020-12-22 19:41:46,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:41:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-22 19:41:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 214. [2020-12-22 19:41:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 19:41:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-12-22 19:41:46,775 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2020-12-22 19:41:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:41:46,775 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-12-22 19:41:46,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 19:41:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-12-22 19:41:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-22 19:41:46,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:41:46,777 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-22 19:41:46,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 19:41:46,978 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:41:46,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:41:46,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1584117369, now seen corresponding path program 29 times [2020-12-22 19:41:46,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:41:46,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830905544] [2020-12-22 19:41:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:41:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:41:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 19:41:48,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830905544] [2020-12-22 19:41:48,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424520054] [2020-12-22 19:41:48,265 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 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 19:42:02,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-22 19:42:02,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:42:02,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 19:42:02,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:42:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 19:42:02,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:42:02,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 19:42:02,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992804489] [2020-12-22 19:42:02,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 19:42:02,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:42:02,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 19:42:02,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:42:02,541 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 44 states. [2020-12-22 19:42:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:42:03,177 INFO L93 Difference]: Finished difference Result 369 states and 370 transitions. [2020-12-22 19:42:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 19:42:03,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 213 [2020-12-22 19:42:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:42:03,180 INFO L225 Difference]: With dead ends: 369 [2020-12-22 19:42:03,180 INFO L226 Difference]: Without dead ends: 369 [2020-12-22 19:42:03,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:42:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-12-22 19:42:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 218. [2020-12-22 19:42:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 19:42:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2020-12-22 19:42:03,185 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 213 [2020-12-22 19:42:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:42:03,185 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2020-12-22 19:42:03,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 19:42:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2020-12-22 19:42:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 19:42:03,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:42:03,187 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-22 19:42:03,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 19:42:03,402 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:42:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:42:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1774653596, now seen corresponding path program 30 times [2020-12-22 19:42:03,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:42:03,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83539981] [2020-12-22 19:42:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:42:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:42:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3597 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 19:42:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83539981] [2020-12-22 19:42:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234226096] [2020-12-22 19:42:04,679 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 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 19:42:07,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 19:42:07,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:42:07,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:42:07,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:42:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3597 backedges. 121 proven. 276 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-12-22 19:42:08,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:42:08,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 18] total 61 [2020-12-22 19:42:08,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738736052] [2020-12-22 19:42:08,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 19:42:08,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:42:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 19:42:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1588, Invalid=2072, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 19:42:08,083 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand 61 states. [2020-12-22 19:42:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:42:11,910 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2020-12-22 19:42:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 19:42:11,910 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 217 [2020-12-22 19:42:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:42:11,913 INFO L225 Difference]: With dead ends: 381 [2020-12-22 19:42:11,913 INFO L226 Difference]: Without dead ends: 381 [2020-12-22 19:42:11,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3470 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4193, Invalid=6727, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 19:42:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-22 19:42:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 226. [2020-12-22 19:42:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-22 19:42:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2020-12-22 19:42:11,920 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 217 [2020-12-22 19:42:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:42:11,920 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2020-12-22 19:42:11,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 19:42:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2020-12-22 19:42:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 19:42:11,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:42:11,921 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-22 19:42:12,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:42:12,135 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:42:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:42:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash 316705432, now seen corresponding path program 31 times [2020-12-22 19:42:12,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:42:12,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632542167] [2020-12-22 19:42:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:42:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:42:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3811 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-22 19:42:13,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632542167] [2020-12-22 19:42:13,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756891265] [2020-12-22 19:42:13,512 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 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 19:42:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:42:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 19:42:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:42:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3811 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-22 19:42:13,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:42:13,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 19:42:13,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510658118] [2020-12-22 19:42:13,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 19:42:13,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:42:13,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 19:42:13,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:42:13,957 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 46 states. [2020-12-22 19:42:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:42:14,657 INFO L93 Difference]: Finished difference Result 386 states and 387 transitions. [2020-12-22 19:42:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 19:42:14,659 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 225 [2020-12-22 19:42:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:42:14,661 INFO L225 Difference]: With dead ends: 386 [2020-12-22 19:42:14,661 INFO L226 Difference]: Without dead ends: 386 [2020-12-22 19:42:14,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:42:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-22 19:42:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 230. [2020-12-22 19:42:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-22 19:42:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2020-12-22 19:42:14,667 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 225 [2020-12-22 19:42:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:42:14,667 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2020-12-22 19:42:14,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 19:42:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2020-12-22 19:42:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 19:42:14,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:42:14,669 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-22 19:42:14,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:42:14,883 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:42:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:42:14,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1949152011, now seen corresponding path program 32 times [2020-12-22 19:42:14,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:42:14,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166479439] [2020-12-22 19:42:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:42:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:42:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-22 19:42:16,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166479439] [2020-12-22 19:42:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154248172] [2020-12-22 19:42:16,360 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 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 19:42:16,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:42:16,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:42:16,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 19:42:16,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:42:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-22 19:42:16,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:42:16,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 19:42:16,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363596234] [2020-12-22 19:42:16,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 19:42:16,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:42:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 19:42:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:42:16,821 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand 47 states. [2020-12-22 19:42:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:42:17,487 INFO L93 Difference]: Finished difference Result 395 states and 396 transitions. [2020-12-22 19:42:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 19:42:17,487 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 229 [2020-12-22 19:42:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:42:17,489 INFO L225 Difference]: With dead ends: 395 [2020-12-22 19:42:17,489 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 19:42:17,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:42:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 19:42:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 234. [2020-12-22 19:42:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 19:42:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-12-22 19:42:17,495 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 229 [2020-12-22 19:42:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:42:17,495 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-12-22 19:42:17,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 19:42:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-12-22 19:42:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 19:42:17,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:42:17,497 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-22 19:42:17,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:42:17,710 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:42:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:42:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash -684615470, now seen corresponding path program 33 times [2020-12-22 19:42:17,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:42:17,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42442556] [2020-12-22 19:42:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:42:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:42:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4153 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-22 19:42:19,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42442556] [2020-12-22 19:42:19,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104669909] [2020-12-22 19:42:19,298 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 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 19:42:19,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 19:42:19,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:42:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:42:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:42:19,585 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:42:19,586 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:42:19,592 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:42:19,593 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:42:19,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:42:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4153 backedges. 173 proven. 325 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2020-12-22 19:42:20,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:42:20,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 18] total 64 [2020-12-22 19:42:20,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348286942] [2020-12-22 19:42:20,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 19:42:20,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:42:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 19:42:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1699, Invalid=2333, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 19:42:20,458 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 64 states. [2020-12-22 19:42:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:42:24,173 INFO L93 Difference]: Finished difference Result 375 states and 407 transitions. [2020-12-22 19:42:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 19:42:24,174 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 233 [2020-12-22 19:42:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:42:24,176 INFO L225 Difference]: With dead ends: 375 [2020-12-22 19:42:24,176 INFO L226 Difference]: Without dead ends: 375 [2020-12-22 19:42:24,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3331, Invalid=5789, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 19:42:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-22 19:42:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 246. [2020-12-22 19:42:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-22 19:42:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2020-12-22 19:42:24,183 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 233 [2020-12-22 19:42:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:42:24,193 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2020-12-22 19:42:24,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 19:42:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2020-12-22 19:42:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-12-22 19:42:24,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:42:24,194 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-22 19:42:24,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 19:42:24,408 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:42:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:42:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1191369571, now seen corresponding path program 34 times [2020-12-22 19:42:24,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:42:24,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947115962] [2020-12-22 19:42:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:42:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:42:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4564 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 19:42:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947115962] [2020-12-22 19:42:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235169322] [2020-12-22 19:42:26,125 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 19:42:30,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:42:30,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:42:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 19:42:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:42:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4564 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 19:42:30,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:42:30,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 19:42:30,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471362445] [2020-12-22 19:42:30,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 19:42:30,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:42:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 19:42:30,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:42:30,726 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 50 states. [2020-12-22 19:42:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:42:31,520 INFO L93 Difference]: Finished difference Result 421 states and 422 transitions. [2020-12-22 19:42:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 19:42:31,521 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 245 [2020-12-22 19:42:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:42:31,524 INFO L225 Difference]: With dead ends: 421 [2020-12-22 19:42:31,524 INFO L226 Difference]: Without dead ends: 421 [2020-12-22 19:42:31,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:42:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-12-22 19:42:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 250. [2020-12-22 19:42:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-22 19:42:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2020-12-22 19:42:31,529 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2020-12-22 19:42:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:42:31,529 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2020-12-22 19:42:31,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 19:42:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2020-12-22 19:42:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-12-22 19:42:31,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:42:31,531 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-22 19:42:31,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:42:31,747 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:42:31,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:42:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1527827776, now seen corresponding path program 35 times [2020-12-22 19:42:31,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:42:31,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089184303] [2020-12-22 19:42:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:42:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:42:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4749 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 19:42:33,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089184303] [2020-12-22 19:42:33,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471601097] [2020-12-22 19:42:33,487 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 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 19:43:20,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 19:43:20,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 19:43:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4749 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 19:43:20,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:20,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 19:43:20,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58349498] [2020-12-22 19:43:20,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 19:43:20,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:20,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 19:43:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 19:43:20,501 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 51 states. [2020-12-22 19:43:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:21,380 INFO L93 Difference]: Finished difference Result 430 states and 431 transitions. [2020-12-22 19:43:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 19:43:21,381 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 249 [2020-12-22 19:43:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:21,382 INFO L225 Difference]: With dead ends: 430 [2020-12-22 19:43:21,382 INFO L226 Difference]: Without dead ends: 430 [2020-12-22 19:43:21,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 19:43:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-12-22 19:43:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 254. [2020-12-22 19:43:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-22 19:43:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2020-12-22 19:43:21,388 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 249 [2020-12-22 19:43:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:21,388 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2020-12-22 19:43:21,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 19:43:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2020-12-22 19:43:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-22 19:43:21,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:21,390 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-22 19:43:21,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:21,606 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash -253196131, now seen corresponding path program 36 times [2020-12-22 19:43:21,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:21,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946728457] [2020-12-22 19:43:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4938 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 19:43:23,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946728457] [2020-12-22 19:43:23,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785899957] [2020-12-22 19:43:23,422 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 19:43:30,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-22 19:43:30,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:43:30,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4938 backedges. 142 proven. 378 refuted. 0 times theorem prover too weak. 4418 trivial. 0 not checked. [2020-12-22 19:43:31,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:31,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 20] total 70 [2020-12-22 19:43:31,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181044612] [2020-12-22 19:43:31,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 19:43:31,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 19:43:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=2711, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 19:43:31,270 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand 70 states. [2020-12-22 19:43:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:36,185 INFO L93 Difference]: Finished difference Result 442 states and 444 transitions. [2020-12-22 19:43:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 19:43:36,186 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 253 [2020-12-22 19:43:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:36,188 INFO L225 Difference]: With dead ends: 442 [2020-12-22 19:43:36,189 INFO L226 Difference]: Without dead ends: 442 [2020-12-22 19:43:36,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5583, Invalid=8937, Unknown=0, NotChecked=0, Total=14520 [2020-12-22 19:43:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-12-22 19:43:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 262. [2020-12-22 19:43:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 19:43:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2020-12-22 19:43:36,194 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 253 [2020-12-22 19:43:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:36,194 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2020-12-22 19:43:36,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 19:43:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2020-12-22 19:43:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 19:43:36,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:36,196 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2020-12-22 19:43:36,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:36,412 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1791259857, now seen corresponding path program 37 times [2020-12-22 19:43:36,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:36,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651602040] [2020-12-22 19:43:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5188 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-22 19:43:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651602040] [2020-12-22 19:43:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436013569] [2020-12-22 19:43:38,320 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 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 19:43:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 19:43:38,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5188 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-22 19:43:38,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:38,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 19:43:38,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488117350] [2020-12-22 19:43:38,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 19:43:38,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:38,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 19:43:38,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:43:38,807 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 53 states. [2020-12-22 19:43:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:39,636 INFO L93 Difference]: Finished difference Result 447 states and 448 transitions. [2020-12-22 19:43:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 19:43:39,636 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 261 [2020-12-22 19:43:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:39,638 INFO L225 Difference]: With dead ends: 447 [2020-12-22 19:43:39,638 INFO L226 Difference]: Without dead ends: 447 [2020-12-22 19:43:39,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:43:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-12-22 19:43:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 266. [2020-12-22 19:43:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-22 19:43:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2020-12-22 19:43:39,647 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 261 [2020-12-22 19:43:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:39,649 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2020-12-22 19:43:39,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 19:43:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2020-12-22 19:43:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-12-22 19:43:39,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:39,650 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2020-12-22 19:43:39,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 19:43:39,865 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1366625454, now seen corresponding path program 38 times [2020-12-22 19:43:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:39,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385492861] [2020-12-22 19:43:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5385 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-22 19:43:41,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385492861] [2020-12-22 19:43:41,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499259106] [2020-12-22 19:43:41,890 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 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 19:43:42,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:43:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:42,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 19:43:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5385 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-22 19:43:42,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:42,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 19:43:42,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538749740] [2020-12-22 19:43:42,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 19:43:42,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 19:43:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:43:42,422 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand 54 states. [2020-12-22 19:43:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:43,250 INFO L93 Difference]: Finished difference Result 456 states and 457 transitions. [2020-12-22 19:43:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 19:43:43,251 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 265 [2020-12-22 19:43:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:43,254 INFO L225 Difference]: With dead ends: 456 [2020-12-22 19:43:43,254 INFO L226 Difference]: Without dead ends: 456 [2020-12-22 19:43:43,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:43:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-12-22 19:43:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 270. [2020-12-22 19:43:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-22 19:43:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2020-12-22 19:43:43,259 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 265 [2020-12-22 19:43:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:43,259 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2020-12-22 19:43:43,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 19:43:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2020-12-22 19:43:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-12-22 19:43:43,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:43,261 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2020-12-22 19:43:43,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:43,471 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1137938933, now seen corresponding path program 39 times [2020-12-22 19:43:43,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:43,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779822619] [2020-12-22 19:43:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5586 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-22 19:43:45,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779822619] [2020-12-22 19:43:45,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569040454] [2020-12-22 19:43:45,510 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:45,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 19:43:45,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 19:43:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:45,867 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:43:45,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:43:45,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:43:45,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:43:45,875 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:43:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5586 backedges. 201 proven. 435 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2020-12-22 19:43:46,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:46,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 20] total 73 [2020-12-22 19:43:46,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123382762] [2020-12-22 19:43:46,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 19:43:46,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 19:43:46,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=3024, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 19:43:46,963 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 73 states. [2020-12-22 19:43:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:52,041 INFO L93 Difference]: Finished difference Result 431 states and 468 transitions. [2020-12-22 19:43:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 19:43:52,042 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 269 [2020-12-22 19:43:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:52,043 INFO L225 Difference]: With dead ends: 431 [2020-12-22 19:43:52,043 INFO L226 Difference]: Without dead ends: 431 [2020-12-22 19:43:52,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4378, Invalid=7612, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 19:43:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-12-22 19:43:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 282. [2020-12-22 19:43:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 19:43:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2020-12-22 19:43:52,052 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 269 [2020-12-22 19:43:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:52,053 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2020-12-22 19:43:52,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 19:43:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2020-12-22 19:43:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-12-22 19:43:52,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:52,054 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2020-12-22 19:43:52,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:52,268 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1094920420, now seen corresponding path program 40 times [2020-12-22 19:43:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:52,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001078252] [2020-12-22 19:43:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6061 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-12-22 19:43:54,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001078252] [2020-12-22 19:43:54,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063413266] [2020-12-22 19:43:54,591 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:44:02,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:44:02,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:44:02,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 19:44:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:44:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6061 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-12-22 19:44:03,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:44:03,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-22 19:44:03,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506434999] [2020-12-22 19:44:03,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 19:44:03,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:44:03,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 19:44:03,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 19:44:03,171 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 57 states. [2020-12-22 19:44:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:44:04,184 INFO L93 Difference]: Finished difference Result 482 states and 483 transitions. [2020-12-22 19:44:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 19:44:04,185 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 281 [2020-12-22 19:44:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:44:04,188 INFO L225 Difference]: With dead ends: 482 [2020-12-22 19:44:04,188 INFO L226 Difference]: Without dead ends: 482 [2020-12-22 19:44:04,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 19:44:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-22 19:44:04,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 286. [2020-12-22 19:44:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 19:44:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-12-22 19:44:04,193 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2020-12-22 19:44:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:44:04,193 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-12-22 19:44:04,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 19:44:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-12-22 19:44:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-12-22 19:44:04,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:44:04,195 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2020-12-22 19:44:04,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 19:44:04,411 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:44:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:44:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2042110343, now seen corresponding path program 41 times [2020-12-22 19:44:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:44:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188606297] [2020-12-22 19:44:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:44:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:44:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6274 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-12-22 19:44:06,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188606297] [2020-12-22 19:44:06,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780942517] [2020-12-22 19:44:06,793 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true