/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/termination-crafted/LexIndexValue-Pointer-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:57:21,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:57:21,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:57:21,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:57:21,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:57:21,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:57:21,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:57:21,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:57:21,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:57:21,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:57:21,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:57:21,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:57:21,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:57:21,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:57:21,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:57:21,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:57:21,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:57:21,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:57:21,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:57:21,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:57:21,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:57:21,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:57:21,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:57:21,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:57:21,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:57:21,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:57:21,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:57:21,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:57:21,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:57:21,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:57:21,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:57:21,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:57:21,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:57:21,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:57:21,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:57:21,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:57:21,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:57:21,845 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:57:21,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:57:21,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:57:21,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:57:21,850 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:57:21,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:57:21,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:57:21,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:57:21,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:57:21,852 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:57:21,852 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:57:21,853 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:57:21,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:57:21,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:57:21,854 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:57:21,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:57:21,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:57:21,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:57:21,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:21,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:57:21,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:57:21,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:57:21,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:57:21,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:57:21,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:57:22,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:57:22,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:57:22,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:57:22,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:57:22,344 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:57:22,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2020-12-23 16:57:22,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82c18a79e/69a5576c823643cc8db1b452482a3219/FLAG9e95fcc77 [2020-12-23 16:57:23,150 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:57:23,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2020-12-23 16:57:23,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82c18a79e/69a5576c823643cc8db1b452482a3219/FLAG9e95fcc77 [2020-12-23 16:57:23,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82c18a79e/69a5576c823643cc8db1b452482a3219 [2020-12-23 16:57:23,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:57:23,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:57:23,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:23,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:57:23,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:57:23,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3cfafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23, skipping insertion in model container [2020-12-23 16:57:23,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:57:23,585 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~p~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2020-12-23 16:57:23,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:23,761 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~p~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2020-12-23 16:57:23,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:23,797 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:57:23,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23 WrapperNode [2020-12-23 16:57:23,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:23,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:23,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:57:23,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:57:23,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:23,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:57:23,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:57:23,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:57:23,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... [2020-12-23 16:57:23,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:57:23,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:57:23,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:57:23,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:57:23,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:57:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:57:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:57:23,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:57:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:57:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:57:24,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:57:24,281 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 16:57:24,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:24 BoogieIcfgContainer [2020-12-23 16:57:24,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:57:24,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:57:24,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:57:24,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:57:24,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:57:23" (1/3) ... [2020-12-23 16:57:24,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc8c54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:24, skipping insertion in model container [2020-12-23 16:57:24,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:23" (2/3) ... [2020-12-23 16:57:24,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc8c54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:24, skipping insertion in model container [2020-12-23 16:57:24,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:24" (3/3) ... [2020-12-23 16:57:24,295 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2020-12-23 16:57:24,303 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:57:24,309 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-12-23 16:57:24,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-12-23 16:57:24,428 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:57:24,428 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:57:24,429 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:57:24,429 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:57:24,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:57:24,429 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:57:24,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:57:24,430 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:57:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-23 16:57:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 16:57:24,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:24,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 16:57:24,492 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:24,500 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-23 16:57:24,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:24,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311719022] [2020-12-23 16:57:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:24,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311719022] [2020-12-23 16:57:24,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:24,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:24,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692977176] [2020-12-23 16:57:24,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:24,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:24,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:24,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:24,796 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-12-23 16:57:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:24,905 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-23 16:57:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:24,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 16:57:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:24,919 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:57:24,921 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 16:57:24,928 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 [2020-12-23 16:57:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 16:57:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 16:57:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:57:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 16:57:24,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2020-12-23 16:57:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:24,980 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 16:57:24,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 16:57:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 16:57:24,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:24,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 16:57:24,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:57:24,984 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:24,988 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-23 16:57:24,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:24,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994264344] [2020-12-23 16:57:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:25,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994264344] [2020-12-23 16:57:25,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:25,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:25,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336376674] [2020-12-23 16:57:25,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:25,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:25,088 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-12-23 16:57:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:25,136 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-23 16:57:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:25,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 16:57:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:25,138 INFO L225 Difference]: With dead ends: 32 [2020-12-23 16:57:25,138 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 16:57:25,139 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 [2020-12-23 16:57:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 16:57:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-12-23 16:57:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 16:57:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 16:57:25,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2020-12-23 16:57:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:25,146 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 16:57:25,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 16:57:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:57:25,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:25,147 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:25,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:57:25,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2020-12-23 16:57:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:25,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729268727] [2020-12-23 16:57:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729268727] [2020-12-23 16:57:25,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170101907] [2020-12-23 16:57:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:25,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:57:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:25,460 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 [2020-12-23 16:57:25,463 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:25,470 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:25,472 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:25,472 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:57:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:25,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:25,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-23 16:57:25,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338662963] [2020-12-23 16:57:25,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:57:25,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:25,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:57:25,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:57:25,512 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-12-23 16:57:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:25,603 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-23 16:57:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:25,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 16:57:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:25,605 INFO L225 Difference]: With dead ends: 35 [2020-12-23 16:57:25,605 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 16:57:25,605 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 [2020-12-23 16:57:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 16:57:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 16:57:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 16:57:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-23 16:57:25,611 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 8 [2020-12-23 16:57:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:25,611 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-23 16:57:25,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:57:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-23 16:57:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:57:25,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:25,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 16:57:25,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 16:57:25,829 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:25,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:25,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1401693698, now seen corresponding path program 1 times [2020-12-23 16:57:25,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:25,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740704159] [2020-12-23 16:57:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 16:57:25,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740704159] [2020-12-23 16:57:25,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:25,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:25,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577686169] [2020-12-23 16:57:25,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:25,913 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 4 states. [2020-12-23 16:57:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:25,982 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-23 16:57:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:25,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 16:57:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:25,984 INFO L225 Difference]: With dead ends: 32 [2020-12-23 16:57:25,984 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 16:57:25,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 16:57:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 16:57:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 16:57:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 16:57:25,994 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-12-23 16:57:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:25,995 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 16:57:25,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 16:57:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:57:25,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:25,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 16:57:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:57:26,001 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:26,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1401693699, now seen corresponding path program 1 times [2020-12-23 16:57:26,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:26,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042609640] [2020-12-23 16:57:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:26,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042609640] [2020-12-23 16:57:26,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255462844] [2020-12-23 16:57:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 16:57:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:26,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:26,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 16:57:26,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239375219] [2020-12-23 16:57:26,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:57:26,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:57:26,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:26,235 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-12-23 16:57:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:26,265 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-23 16:57:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:26,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-23 16:57:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:26,267 INFO L225 Difference]: With dead ends: 39 [2020-12-23 16:57:26,267 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 16:57:26,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 16:57:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-23 16:57:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 16:57:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 16:57:26,273 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 17 [2020-12-23 16:57:26,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:26,273 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 16:57:26,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:57:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 16:57:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:57:26,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:26,274 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-23 16:57:26,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:26,488 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 519338592, now seen corresponding path program 2 times [2020-12-23 16:57:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:26,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471921395] [2020-12-23 16:57:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:26,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471921395] [2020-12-23 16:57:26,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513425302] [2020-12-23 16:57:26,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:26,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:26,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:57:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:26,614 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 [2020-12-23 16:57:26,615 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:26,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:26,620 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:26,621 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:57:26,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:26,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-23 16:57:26,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208985453] [2020-12-23 16:57:26,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:26,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:26,670 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2020-12-23 16:57:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:26,744 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-23 16:57:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:26,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-23 16:57:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:26,747 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:57:26,747 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 16:57:26,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:57:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 16:57:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-23 16:57:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:57:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 16:57:26,768 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 21 [2020-12-23 16:57:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:26,768 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 16:57:26,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 16:57:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:57:26,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:26,770 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:26,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:26,984 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1143766362, now seen corresponding path program 1 times [2020-12-23 16:57:26,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:26,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822891216] [2020-12-23 16:57:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:57:27,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822891216] [2020-12-23 16:57:27,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740988724] [2020-12-23 16:57:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 16:57:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:57:27,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:27,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 16:57:27,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212907053] [2020-12-23 16:57:27,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:57:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:57:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:27,152 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-12-23 16:57:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:27,184 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-23 16:57:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:57:27,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 16:57:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:27,187 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:57:27,188 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:57:27,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:57:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-12-23 16:57:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:57:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-23 16:57:27,192 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 24 [2020-12-23 16:57:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:27,193 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-23 16:57:27,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:57:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-23 16:57:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:57:27,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:27,194 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:27,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:27,408 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:27,409 INFO L82 PathProgramCache]: Analyzing trace with hash -213191075, now seen corresponding path program 2 times [2020-12-23 16:57:27,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:27,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771599266] [2020-12-23 16:57:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:57:27,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771599266] [2020-12-23 16:57:27,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730287516] [2020-12-23 16:57:27,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:27,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:27,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:27,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:57:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:57:27,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:27,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 16:57:27,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837626616] [2020-12-23 16:57:27,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:57:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:57:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:27,687 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 9 states. [2020-12-23 16:57:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:27,727 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-12-23 16:57:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:57:27,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 16:57:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:27,728 INFO L225 Difference]: With dead ends: 54 [2020-12-23 16:57:27,728 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:57:27,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:57:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-23 16:57:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 16:57:27,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-23 16:57:27,734 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2020-12-23 16:57:27,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:27,734 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-23 16:57:27,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:57:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-23 16:57:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:57:27,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:27,736 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:27,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:27,950 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:27,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:27,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1934674464, now seen corresponding path program 3 times [2020-12-23 16:57:27,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:27,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278766929] [2020-12-23 16:57:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:57:28,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278766929] [2020-12-23 16:57:28,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377736948] [2020-12-23 16:57:28,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:28,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 16:57:28,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:57:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 16:57:28,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:28,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2020-12-23 16:57:28,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056789666] [2020-12-23 16:57:28,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:57:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:57:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:57:28,242 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 15 states. [2020-12-23 16:57:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:28,934 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-12-23 16:57:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:57:28,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-12-23 16:57:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:28,935 INFO L225 Difference]: With dead ends: 123 [2020-12-23 16:57:28,935 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 16:57:28,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:57:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 16:57:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 62. [2020-12-23 16:57:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 16:57:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-23 16:57:28,942 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 32 [2020-12-23 16:57:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:28,943 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-23 16:57:28,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:57:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-23 16:57:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 16:57:28,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:28,944 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:29,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:29,148 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1393686122, now seen corresponding path program 1 times [2020-12-23 16:57:29,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:29,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141003983] [2020-12-23 16:57:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:29,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141003983] [2020-12-23 16:57:29,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591168609] [2020-12-23 16:57:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:29,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:57:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:29,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:29,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 16:57:29,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64204888] [2020-12-23 16:57:29,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 16:57:29,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 16:57:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:57:29,355 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-23 16:57:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:29,407 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-12-23 16:57:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:57:29,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 16:57:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:29,409 INFO L225 Difference]: With dead ends: 69 [2020-12-23 16:57:29,409 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 16:57:29,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:57:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 16:57:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-23 16:57:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 16:57:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-12-23 16:57:29,421 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 36 [2020-12-23 16:57:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:29,422 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-12-23 16:57:29,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 16:57:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-12-23 16:57:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 16:57:29,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:29,426 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:29,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 16:57:29,642 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:29,643 INFO L82 PathProgramCache]: Analyzing trace with hash -20184339, now seen corresponding path program 2 times [2020-12-23 16:57:29,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:29,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314011338] [2020-12-23 16:57:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:29,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314011338] [2020-12-23 16:57:29,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529080038] [2020-12-23 16:57:29,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:29,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:29,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 16:57:29,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-23 16:57:29,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:29,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 12 [2020-12-23 16:57:29,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595146747] [2020-12-23 16:57:29,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:29,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:29,838 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 3 states. [2020-12-23 16:57:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:29,847 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-12-23 16:57:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:29,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 16:57:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:29,848 INFO L225 Difference]: With dead ends: 65 [2020-12-23 16:57:29,848 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 16:57:29,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 16:57:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-23 16:57:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:57:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-12-23 16:57:29,853 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 40 [2020-12-23 16:57:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:29,854 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-12-23 16:57:29,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-12-23 16:57:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 16:57:29,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:29,855 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:30,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 16:57:30,069 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2077689424, now seen corresponding path program 1 times [2020-12-23 16:57:30,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:30,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855827019] [2020-12-23 16:57:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855827019] [2020-12-23 16:57:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264352275] [2020-12-23 16:57:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:30,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:57:30,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:30,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:30,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 16:57:30,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767753556] [2020-12-23 16:57:30,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:57:30,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:30,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:57:30,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:30,337 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 12 states. [2020-12-23 16:57:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:30,388 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-12-23 16:57:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:57:30,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-12-23 16:57:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:30,390 INFO L225 Difference]: With dead ends: 72 [2020-12-23 16:57:30,390 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 16:57:30,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 16:57:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-23 16:57:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 16:57:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-12-23 16:57:30,395 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 42 [2020-12-23 16:57:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:30,396 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-12-23 16:57:30,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:57:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-12-23 16:57:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 16:57:30,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:30,397 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:30,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:30,612 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash -794270573, now seen corresponding path program 2 times [2020-12-23 16:57:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:30,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162368133] [2020-12-23 16:57:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:30,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162368133] [2020-12-23 16:57:30,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520306037] [2020-12-23 16:57:30,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:30,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:30,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:57:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-23 16:57:30,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:30,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2020-12-23 16:57:30,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010199035] [2020-12-23 16:57:30,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:30,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:30,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:30,907 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 4 states. [2020-12-23 16:57:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:30,939 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-12-23 16:57:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:30,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-23 16:57:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:30,941 INFO L225 Difference]: With dead ends: 68 [2020-12-23 16:57:30,941 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 16:57:30,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 16:57:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 16:57:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:57:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-23 16:57:30,945 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 46 [2020-12-23 16:57:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:30,946 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-23 16:57:30,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-23 16:57:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 16:57:30,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:30,947 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 16:57:31,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:31,161 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:31,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1189041073, now seen corresponding path program 4 times [2020-12-23 16:57:31,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:31,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166281370] [2020-12-23 16:57:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:31,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166281370] [2020-12-23 16:57:31,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361535968] [2020-12-23 16:57:31,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:31,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:57:31,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:57:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:31,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:31,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 16:57:31,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021348291] [2020-12-23 16:57:31,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:57:31,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:31,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:57:31,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:31,408 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 13 states. [2020-12-23 16:57:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:31,454 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-12-23 16:57:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:57:31,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-12-23 16:57:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:31,456 INFO L225 Difference]: With dead ends: 71 [2020-12-23 16:57:31,456 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 16:57:31,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 16:57:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-12-23 16:57:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 16:57:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-23 16:57:31,460 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 47 [2020-12-23 16:57:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:31,461 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-23 16:57:31,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:57:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-23 16:57:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 16:57:31,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:31,462 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 16:57:31,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:57:31,677 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash 646801230, now seen corresponding path program 5 times [2020-12-23 16:57:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:31,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987998185] [2020-12-23 16:57:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:31,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987998185] [2020-12-23 16:57:31,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033232260] [2020-12-23 16:57:31,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:31,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 16:57:31,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:57:31,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:32,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:32,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 16:57:32,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785902593] [2020-12-23 16:57:32,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 16:57:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 16:57:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:32,034 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 14 states. [2020-12-23 16:57:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:32,096 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-23 16:57:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:57:32,097 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-12-23 16:57:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:32,098 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:57:32,098 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:57:32,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:57:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-23 16:57:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 16:57:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-23 16:57:32,102 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 51 [2020-12-23 16:57:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:32,103 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-23 16:57:32,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 16:57:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-23 16:57:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 16:57:32,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:32,104 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 16:57:32,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 16:57:32,319 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:32,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1818336149, now seen corresponding path program 6 times [2020-12-23 16:57:32,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:32,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444910805] [2020-12-23 16:57:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:32,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444910805] [2020-12-23 16:57:32,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097600929] [2020-12-23 16:57:32,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:32,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:57:32,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:57:32,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:32,589 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 [2020-12-23 16:57:32,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:32,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:32,595 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:32,595 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-23 16:57:32,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:32,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 19 [2020-12-23 16:57:32,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362995637] [2020-12-23 16:57:32,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:57:32,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:57:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:57:32,759 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2020-12-23 16:57:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:33,253 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-12-23 16:57:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:57:33,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-12-23 16:57:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:33,254 INFO L225 Difference]: With dead ends: 88 [2020-12-23 16:57:33,254 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 16:57:33,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:57:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 16:57:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-12-23 16:57:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 16:57:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-12-23 16:57:33,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 55 [2020-12-23 16:57:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:33,266 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-12-23 16:57:33,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:57:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-12-23 16:57:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 16:57:33,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:33,267 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 16:57:33,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:57:33,478 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:33,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1676555342, now seen corresponding path program 7 times [2020-12-23 16:57:33,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:33,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356381757] [2020-12-23 16:57:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:57:33,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356381757] [2020-12-23 16:57:33,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298255791] [2020-12-23 16:57:33,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 16:57:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:57:33,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:33,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 16:57:33,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174337828] [2020-12-23 16:57:33,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:57:33,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:33,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:57:33,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:57:33,817 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 16 states. [2020-12-23 16:57:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:33,879 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-12-23 16:57:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:57:33,895 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-12-23 16:57:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:33,896 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:57:33,896 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:57:33,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:57:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:57:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-23 16:57:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:57:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-12-23 16:57:33,900 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 62 [2020-12-23 16:57:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:33,900 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-12-23 16:57:33,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:57:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-12-23 16:57:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 16:57:33,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:33,904 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 16:57:34,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:34,117 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash -728733067, now seen corresponding path program 8 times [2020-12-23 16:57:34,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:34,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983010935] [2020-12-23 16:57:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:57:34,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983010935] [2020-12-23 16:57:34,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896985633] [2020-12-23 16:57:34,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:34,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:34,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:34,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:57:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:57:34,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:34,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 16:57:34,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248067596] [2020-12-23 16:57:34,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:57:34,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:57:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:57:34,520 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 17 states. [2020-12-23 16:57:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:34,590 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-23 16:57:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:57:34,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-23 16:57:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:34,591 INFO L225 Difference]: With dead ends: 94 [2020-12-23 16:57:34,591 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 16:57:34,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:57:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 16:57:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-12-23 16:57:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 16:57:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-12-23 16:57:34,596 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 66 [2020-12-23 16:57:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:34,596 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-12-23 16:57:34,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:57:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-12-23 16:57:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 16:57:34,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:34,597 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 16:57:34,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:57:34,810 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1531703224, now seen corresponding path program 9 times [2020-12-23 16:57:34,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:34,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818682149] [2020-12-23 16:57:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:57:35,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818682149] [2020-12-23 16:57:35,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607180234] [2020-12-23 16:57:35,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:35,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:57:35,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 16:57:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:35,089 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 [2020-12-23 16:57:35,090 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:35,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:35,095 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:35,095 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-23 16:57:35,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:35,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 24 [2020-12-23 16:57:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112743923] [2020-12-23 16:57:35,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:57:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:35,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:57:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:57:35,310 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 24 states. [2020-12-23 16:57:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:36,010 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-12-23 16:57:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:57:36,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-12-23 16:57:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:36,012 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:57:36,012 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 16:57:36,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:57:36,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 16:57:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2020-12-23 16:57:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 16:57:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2020-12-23 16:57:36,017 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 70 [2020-12-23 16:57:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:36,017 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2020-12-23 16:57:36,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:57:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2020-12-23 16:57:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:57:36,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:36,018 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-23 16:57:36,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:36,219 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash -152010145, now seen corresponding path program 10 times [2020-12-23 16:57:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:36,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880399210] [2020-12-23 16:57:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:57:36,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880399210] [2020-12-23 16:57:36,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396951151] [2020-12-23 16:57:36,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:36,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:57:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:36,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 16:57:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:57:36,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:36,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 16:57:36,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891537506] [2020-12-23 16:57:36,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:57:36,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:57:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:57:36,688 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 19 states. [2020-12-23 16:57:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:36,769 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-12-23 16:57:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:57:36,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-12-23 16:57:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:36,771 INFO L225 Difference]: With dead ends: 109 [2020-12-23 16:57:36,772 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 16:57:36,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:57:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 16:57:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-12-23 16:57:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 16:57:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-12-23 16:57:36,776 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 77 [2020-12-23 16:57:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:36,776 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-12-23 16:57:36,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:57:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-12-23 16:57:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 16:57:36,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:36,777 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-23 16:57:36,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:36,993 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash -876731076, now seen corresponding path program 11 times [2020-12-23 16:57:36,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:36,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206504288] [2020-12-23 16:57:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:57:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206504288] [2020-12-23 16:57:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24410775] [2020-12-23 16:57:37,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:37,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 16:57:37,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:37,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 16:57:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:57:37,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:37,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 16:57:37,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525224847] [2020-12-23 16:57:37,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:57:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:57:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:57:37,453 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 20 states. [2020-12-23 16:57:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:37,527 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-12-23 16:57:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:57:37,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-12-23 16:57:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:37,529 INFO L225 Difference]: With dead ends: 113 [2020-12-23 16:57:37,529 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 16:57:37,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:57:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 16:57:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-12-23 16:57:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 16:57:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2020-12-23 16:57:37,533 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 81 [2020-12-23 16:57:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:37,533 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2020-12-23 16:57:37,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:57:37,533 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2020-12-23 16:57:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 16:57:37,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:37,534 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-23 16:57:37,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 16:57:37,748 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1762988441, now seen corresponding path program 12 times [2020-12-23 16:57:37,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:37,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144193940] [2020-12-23 16:57:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:57:37,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144193940] [2020-12-23 16:57:37,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023183653] [2020-12-23 16:57:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:38,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 16:57:38,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:38,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 16:57:38,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:38,113 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 [2020-12-23 16:57:38,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:38,117 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:38,118 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:38,118 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-12-23 16:57:38,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:38,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 28 [2020-12-23 16:57:38,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637448157] [2020-12-23 16:57:38,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:57:38,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:57:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:57:38,378 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 28 states. [2020-12-23 16:57:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:39,248 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2020-12-23 16:57:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:57:39,251 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-12-23 16:57:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:39,252 INFO L225 Difference]: With dead ends: 126 [2020-12-23 16:57:39,252 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 16:57:39,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:57:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 16:57:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-23 16:57:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 16:57:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2020-12-23 16:57:39,256 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 85 [2020-12-23 16:57:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:39,257 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2020-12-23 16:57:39,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:57:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2020-12-23 16:57:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 16:57:39,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:39,258 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-23 16:57:39,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:39,473 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1293987708, now seen corresponding path program 13 times [2020-12-23 16:57:39,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:39,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938540639] [2020-12-23 16:57:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:57:39,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938540639] [2020-12-23 16:57:39,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70286093] [2020-12-23 16:57:39,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:57:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:57:39,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:39,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 16:57:39,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906203814] [2020-12-23 16:57:39,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:57:39,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:57:39,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:57:39,932 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 22 states. [2020-12-23 16:57:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:40,050 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2020-12-23 16:57:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:57:40,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 92 [2020-12-23 16:57:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:40,052 INFO L225 Difference]: With dead ends: 128 [2020-12-23 16:57:40,052 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 16:57:40,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:57:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 16:57:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-12-23 16:57:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 16:57:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2020-12-23 16:57:40,059 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 92 [2020-12-23 16:57:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:40,059 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2020-12-23 16:57:40,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:57:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2020-12-23 16:57:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 16:57:40,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:40,061 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-23 16:57:40,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 16:57:40,276 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:40,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:40,276 INFO L82 PathProgramCache]: Analyzing trace with hash 331741191, now seen corresponding path program 14 times [2020-12-23 16:57:40,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:40,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694407113] [2020-12-23 16:57:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:57:40,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694407113] [2020-12-23 16:57:40,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019531123] [2020-12-23 16:57:40,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:40,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:57:40,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:57:40,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:40,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 16:57:40,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603034303] [2020-12-23 16:57:40,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:57:40,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:57:40,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:57:40,777 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand 23 states. [2020-12-23 16:57:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:40,874 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2020-12-23 16:57:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:57:40,875 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 96 [2020-12-23 16:57:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:40,876 INFO L225 Difference]: With dead ends: 132 [2020-12-23 16:57:40,876 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 16:57:40,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:57:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 16:57:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-12-23 16:57:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 16:57:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2020-12-23 16:57:40,880 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 96 [2020-12-23 16:57:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:40,880 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2020-12-23 16:57:40,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:57:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2020-12-23 16:57:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 16:57:40,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:40,882 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-23 16:57:41,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 16:57:41,098 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash -902355446, now seen corresponding path program 15 times [2020-12-23 16:57:41,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:41,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801288629] [2020-12-23 16:57:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:57:41,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801288629] [2020-12-23 16:57:41,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529065721] [2020-12-23 16:57:41,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:41,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 16:57:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:41,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:57:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:41,460 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 [2020-12-23 16:57:41,461 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:41,464 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:41,465 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:41,465 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-12-23 16:57:41,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:41,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 32 [2020-12-23 16:57:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649482510] [2020-12-23 16:57:41,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:57:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:57:41,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:57:41,787 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand 32 states. [2020-12-23 16:57:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:42,924 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2020-12-23 16:57:42,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:57:42,924 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 100 [2020-12-23 16:57:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:42,925 INFO L225 Difference]: With dead ends: 145 [2020-12-23 16:57:42,925 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 16:57:42,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=864, Invalid=2796, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 16:57:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 16:57:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-12-23 16:57:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 16:57:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2020-12-23 16:57:42,930 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 100 [2020-12-23 16:57:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:42,930 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2020-12-23 16:57:42,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:57:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2020-12-23 16:57:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 16:57:42,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:42,932 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-23 16:57:43,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:43,148 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash 232116749, now seen corresponding path program 16 times [2020-12-23 16:57:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:43,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042546813] [2020-12-23 16:57:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 16:57:43,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042546813] [2020-12-23 16:57:43,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020499870] [2020-12-23 16:57:43,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:43,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:57:43,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 16:57:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 16:57:44,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:44,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 16:57:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699330456] [2020-12-23 16:57:44,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:57:44,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:57:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:57:44,025 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand 25 states. [2020-12-23 16:57:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:44,125 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2020-12-23 16:57:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:57:44,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-12-23 16:57:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:44,127 INFO L225 Difference]: With dead ends: 147 [2020-12-23 16:57:44,127 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 16:57:44,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:57:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 16:57:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-12-23 16:57:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 16:57:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-12-23 16:57:44,131 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 107 [2020-12-23 16:57:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:44,132 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-12-23 16:57:44,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:57:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-12-23 16:57:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 16:57:44,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:44,133 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-23 16:57:44,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:57:44,349 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1718561750, now seen corresponding path program 17 times [2020-12-23 16:57:44,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:44,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43529516] [2020-12-23 16:57:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 16:57:44,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43529516] [2020-12-23 16:57:44,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385488396] [2020-12-23 16:57:44,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:45,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 16:57:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:45,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:57:45,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 16:57:45,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:45,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 16:57:45,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023554902] [2020-12-23 16:57:45,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:57:45,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:57:45,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:57:45,238 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 26 states. [2020-12-23 16:57:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:45,356 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2020-12-23 16:57:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:57:45,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2020-12-23 16:57:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:45,357 INFO L225 Difference]: With dead ends: 151 [2020-12-23 16:57:45,358 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 16:57:45,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:57:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 16:57:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-12-23 16:57:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 16:57:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 156 transitions. [2020-12-23 16:57:45,362 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 156 transitions. Word has length 111 [2020-12-23 16:57:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:45,363 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 156 transitions. [2020-12-23 16:57:45,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:57:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 156 transitions. [2020-12-23 16:57:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 16:57:45,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:45,364 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-23 16:57:45,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:45,577 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -309100601, now seen corresponding path program 18 times [2020-12-23 16:57:45,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:45,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32064118] [2020-12-23 16:57:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 16:57:45,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32064118] [2020-12-23 16:57:45,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925853948] [2020-12-23 16:57:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:46,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 16:57:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:46,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 16:57:46,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 89 proven. 51 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2020-12-23 16:57:46,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:46,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15] total 40 [2020-12-23 16:57:46,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238613718] [2020-12-23 16:57:46,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 16:57:46,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 16:57:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:57:46,616 INFO L87 Difference]: Start difference. First operand 148 states and 156 transitions. Second operand 40 states. [2020-12-23 16:57:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:48,814 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-12-23 16:57:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 16:57:48,815 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2020-12-23 16:57:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:48,816 INFO L225 Difference]: With dead ends: 163 [2020-12-23 16:57:48,816 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 16:57:48,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1276, Invalid=3980, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 16:57:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 16:57:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-12-23 16:57:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 16:57:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2020-12-23 16:57:48,827 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 115 [2020-12-23 16:57:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:48,828 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2020-12-23 16:57:48,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 16:57:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2020-12-23 16:57:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 16:57:48,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:48,829 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-23 16:57:49,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:57:49,030 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2073592985, now seen corresponding path program 19 times [2020-12-23 16:57:49,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:49,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592000856] [2020-12-23 16:57:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:49,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592000856] [2020-12-23 16:57:49,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437433731] [2020-12-23 16:57:49,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:57:49,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:49,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:49,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 16:57:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781039298] [2020-12-23 16:57:49,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:57:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:57:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:57:49,675 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand 29 states. [2020-12-23 16:57:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:49,820 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-12-23 16:57:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:57:49,820 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 126 [2020-12-23 16:57:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:49,821 INFO L225 Difference]: With dead ends: 170 [2020-12-23 16:57:49,822 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 16:57:49,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:57:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 16:57:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-12-23 16:57:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 16:57:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2020-12-23 16:57:49,827 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 126 [2020-12-23 16:57:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:49,827 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2020-12-23 16:57:49,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:57:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2020-12-23 16:57:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 16:57:49,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:49,828 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-23 16:57:50,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:57:50,042 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash 687835996, now seen corresponding path program 20 times [2020-12-23 16:57:50,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:50,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286744424] [2020-12-23 16:57:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:50,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286744424] [2020-12-23 16:57:50,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351360532] [2020-12-23 16:57:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:50,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:50,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:57:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:50,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:50,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 16:57:50,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156374266] [2020-12-23 16:57:50,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:57:50,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:50,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:57:50,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:57:50,729 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 30 states. [2020-12-23 16:57:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:50,840 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2020-12-23 16:57:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:57:50,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 130 [2020-12-23 16:57:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:50,843 INFO L225 Difference]: With dead ends: 174 [2020-12-23 16:57:50,843 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 16:57:50,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:57:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 16:57:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-12-23 16:57:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 16:57:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 180 transitions. [2020-12-23 16:57:50,848 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 180 transitions. Word has length 130 [2020-12-23 16:57:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:50,848 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 180 transitions. [2020-12-23 16:57:50,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:57:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 180 transitions. [2020-12-23 16:57:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 16:57:50,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:50,849 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-23 16:57:51,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:51,065 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash 707754143, now seen corresponding path program 21 times [2020-12-23 16:57:51,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:51,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291615833] [2020-12-23 16:57:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 16:57:51,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291615833] [2020-12-23 16:57:51,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482572461] [2020-12-23 16:57:51,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:51,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 16:57:51,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 16:57:51,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:51,628 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 [2020-12-23 16:57:51,628 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:51,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:51,632 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:51,633 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2020-12-23 16:57:52,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:52,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14] total 43 [2020-12-23 16:57:52,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010032580] [2020-12-23 16:57:52,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:57:52,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:57:52,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:57:52,150 INFO L87 Difference]: Start difference. First operand 171 states and 180 transitions. Second operand 43 states. [2020-12-23 16:57:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:54,168 INFO L93 Difference]: Finished difference Result 188 states and 198 transitions. [2020-12-23 16:57:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 16:57:54,168 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2020-12-23 16:57:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:54,170 INFO L225 Difference]: With dead ends: 188 [2020-12-23 16:57:54,170 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 16:57:54,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1538, Invalid=4942, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 16:57:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 16:57:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-23 16:57:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 16:57:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 196 transitions. [2020-12-23 16:57:54,178 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 196 transitions. Word has length 134 [2020-12-23 16:57:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:54,178 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 196 transitions. [2020-12-23 16:57:54,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:57:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 196 transitions. [2020-12-23 16:57:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 16:57:54,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:54,179 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-23 16:57:54,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:54,393 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 565694197, now seen corresponding path program 22 times [2020-12-23 16:57:54,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:54,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510586366] [2020-12-23 16:57:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1745 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:54,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510586366] [2020-12-23 16:57:54,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69456895] [2020-12-23 16:57:54,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:56,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:57:56,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:56,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 16:57:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1745 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:56,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:56,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 16:57:56,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430689877] [2020-12-23 16:57:56,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:57:56,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:56,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:57:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:57:56,268 INFO L87 Difference]: Start difference. First operand 186 states and 196 transitions. Second operand 33 states. [2020-12-23 16:57:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:56,413 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-12-23 16:57:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:57:56,413 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 145 [2020-12-23 16:57:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:56,415 INFO L225 Difference]: With dead ends: 193 [2020-12-23 16:57:56,415 INFO L226 Difference]: Without dead ends: 193 [2020-12-23 16:57:56,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:57:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-23 16:57:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-12-23 16:57:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 16:57:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 200 transitions. [2020-12-23 16:57:56,420 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 200 transitions. Word has length 145 [2020-12-23 16:57:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:56,421 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 200 transitions. [2020-12-23 16:57:56,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:57:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 200 transitions. [2020-12-23 16:57:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 16:57:56,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:56,422 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-23 16:57:56,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 16:57:56,636 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash -801287342, now seen corresponding path program 23 times [2020-12-23 16:57:56,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:56,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777708222] [2020-12-23 16:57:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:57,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777708222] [2020-12-23 16:57:57,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241926785] [2020-12-23 16:57:57,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:58,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-23 16:57:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:57:58,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:58,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:58,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 16:57:58,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487780143] [2020-12-23 16:57:58,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:57:58,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:58,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:57:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:57:58,668 INFO L87 Difference]: Start difference. First operand 190 states and 200 transitions. Second operand 34 states. [2020-12-23 16:57:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:58,852 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-12-23 16:57:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 16:57:58,853 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-12-23 16:57:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:58,855 INFO L225 Difference]: With dead ends: 197 [2020-12-23 16:57:58,855 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 16:57:58,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:57:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 16:57:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-12-23 16:57:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 16:57:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 204 transitions. [2020-12-23 16:57:58,860 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 204 transitions. Word has length 149 [2020-12-23 16:57:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:58,860 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 204 transitions. [2020-12-23 16:57:58,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:57:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 204 transitions. [2020-12-23 16:57:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 16:57:58,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:58,862 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-23 16:57:59,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:59,076 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash -41983697, now seen corresponding path program 24 times [2020-12-23 16:57:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:59,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606790098] [2020-12-23 16:57:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:57:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606790098] [2020-12-23 16:57:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795113717] [2020-12-23 16:57:59,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:00,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 16:58:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:58:00,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 121 proven. 92 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2020-12-23 16:58:00,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:00,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 17] total 50 [2020-12-23 16:58:00,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551816923] [2020-12-23 16:58:00,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:58:00,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:58:00,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1822, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:58:00,958 INFO L87 Difference]: Start difference. First operand 194 states and 204 transitions. Second operand 50 states. [2020-12-23 16:58:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:04,454 INFO L93 Difference]: Finished difference Result 209 states and 220 transitions. [2020-12-23 16:58:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 16:58:04,455 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 153 [2020-12-23 16:58:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:04,457 INFO L225 Difference]: With dead ends: 209 [2020-12-23 16:58:04,457 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 16:58:04,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2095, Invalid=6461, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 16:58:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 16:58:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2020-12-23 16:58:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-23 16:58:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 220 transitions. [2020-12-23 16:58:04,466 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 220 transitions. Word has length 153 [2020-12-23 16:58:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:04,467 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 220 transitions. [2020-12-23 16:58:04,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:58:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 220 transitions. [2020-12-23 16:58:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 16:58:04,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:04,468 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-23 16:58:04,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 16:58:04,682 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:04,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1430874703, now seen corresponding path program 25 times [2020-12-23 16:58:04,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:04,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197748286] [2020-12-23 16:58:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197748286] [2020-12-23 16:58:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036435496] [2020-12-23 16:58:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:58:05,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:05,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:05,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 16:58:05,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558633158] [2020-12-23 16:58:05,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:58:05,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:05,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:58:05,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:58:05,690 INFO L87 Difference]: Start difference. First operand 209 states and 220 transitions. Second operand 37 states. [2020-12-23 16:58:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:05,891 INFO L93 Difference]: Finished difference Result 216 states and 227 transitions. [2020-12-23 16:58:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:58:05,892 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 164 [2020-12-23 16:58:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:05,893 INFO L225 Difference]: With dead ends: 216 [2020-12-23 16:58:05,893 INFO L226 Difference]: Without dead ends: 216 [2020-12-23 16:58:05,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:58:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-23 16:58:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-12-23 16:58:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-23 16:58:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 224 transitions. [2020-12-23 16:58:05,899 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 224 transitions. Word has length 164 [2020-12-23 16:58:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:05,899 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 224 transitions. [2020-12-23 16:58:05,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:58:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 224 transitions. [2020-12-23 16:58:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 16:58:05,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:05,901 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-23 16:58:06,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:58:06,114 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash 879063604, now seen corresponding path program 26 times [2020-12-23 16:58:06,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:06,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393032400] [2020-12-23 16:58:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:06,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393032400] [2020-12-23 16:58:06,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289486382] [2020-12-23 16:58:06,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:06,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:58:06,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:07,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:07,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 16:58:07,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579201275] [2020-12-23 16:58:07,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 16:58:07,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:07,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 16:58:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:58:07,108 INFO L87 Difference]: Start difference. First operand 213 states and 224 transitions. Second operand 38 states. [2020-12-23 16:58:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:07,315 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2020-12-23 16:58:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 16:58:07,316 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 168 [2020-12-23 16:58:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:07,317 INFO L225 Difference]: With dead ends: 220 [2020-12-23 16:58:07,318 INFO L226 Difference]: Without dead ends: 220 [2020-12-23 16:58:07,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:58:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-23 16:58:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-12-23 16:58:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 16:58:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 228 transitions. [2020-12-23 16:58:07,323 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 228 transitions. Word has length 168 [2020-12-23 16:58:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:07,323 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 228 transitions. [2020-12-23 16:58:07,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 16:58:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 228 transitions. [2020-12-23 16:58:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 16:58:07,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:07,325 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-23 16:58:07,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 16:58:07,538 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:07,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:07,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1518097719, now seen corresponding path program 27 times [2020-12-23 16:58:07,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:07,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033170093] [2020-12-23 16:58:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 16:58:08,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033170093] [2020-12-23 16:58:08,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463039413] [2020-12-23 16:58:08,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:08,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 16:58:08,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 16:58:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:08,467 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 [2020-12-23 16:58:08,467 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,471 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:08,471 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,471 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:58:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 137 proven. 117 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2020-12-23 16:58:09,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:09,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 16] total 53 [2020-12-23 16:58:09,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079310375] [2020-12-23 16:58:09,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 16:58:09,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 16:58:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=1983, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:58:09,186 INFO L87 Difference]: Start difference. First operand 217 states and 228 transitions. Second operand 53 states. [2020-12-23 16:58:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:12,311 INFO L93 Difference]: Finished difference Result 234 states and 246 transitions. [2020-12-23 16:58:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 16:58:12,312 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 172 [2020-12-23 16:58:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:12,313 INFO L225 Difference]: With dead ends: 234 [2020-12-23 16:58:12,314 INFO L226 Difference]: Without dead ends: 234 [2020-12-23 16:58:12,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2427, Invalid=7673, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 16:58:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-23 16:58:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-12-23 16:58:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 16:58:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 244 transitions. [2020-12-23 16:58:12,320 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 244 transitions. Word has length 172 [2020-12-23 16:58:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:12,320 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 244 transitions. [2020-12-23 16:58:12,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 16:58:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 244 transitions. [2020-12-23 16:58:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 16:58:12,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:12,322 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-23 16:58:12,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:58:12,529 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1355182115, now seen corresponding path program 28 times [2020-12-23 16:58:12,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:12,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509346812] [2020-12-23 16:58:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2846 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:58:13,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509346812] [2020-12-23 16:58:13,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560517322] [2020-12-23 16:58:13,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:15,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 16:58:15,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2846 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:58:15,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:15,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 16:58:15,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120746664] [2020-12-23 16:58:15,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 16:58:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 16:58:15,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:58:15,699 INFO L87 Difference]: Start difference. First operand 232 states and 244 transitions. Second operand 41 states. [2020-12-23 16:58:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:15,899 INFO L93 Difference]: Finished difference Result 239 states and 251 transitions. [2020-12-23 16:58:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:58:15,899 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2020-12-23 16:58:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:15,901 INFO L225 Difference]: With dead ends: 239 [2020-12-23 16:58:15,901 INFO L226 Difference]: Without dead ends: 239 [2020-12-23 16:58:15,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:58:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-12-23 16:58:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2020-12-23 16:58:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-23 16:58:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 248 transitions. [2020-12-23 16:58:15,906 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 248 transitions. Word has length 183 [2020-12-23 16:58:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:15,906 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 248 transitions. [2020-12-23 16:58:15,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 16:58:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 248 transitions. [2020-12-23 16:58:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-12-23 16:58:15,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:15,908 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-23 16:58:16,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:58:16,122 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:16,123 INFO L82 PathProgramCache]: Analyzing trace with hash -690624902, now seen corresponding path program 29 times [2020-12-23 16:58:16,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:16,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877350234] [2020-12-23 16:58:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2995 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:58:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877350234] [2020-12-23 16:58:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279975832] [2020-12-23 16:58:17,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:22,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2020-12-23 16:58:22,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:58:22,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2995 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:58:22,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:22,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 16:58:22,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23112386] [2020-12-23 16:58:22,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 16:58:22,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:22,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 16:58:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:58:22,445 INFO L87 Difference]: Start difference. First operand 236 states and 248 transitions. Second operand 42 states. [2020-12-23 16:58:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:22,653 INFO L93 Difference]: Finished difference Result 243 states and 255 transitions. [2020-12-23 16:58:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 16:58:22,653 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 187 [2020-12-23 16:58:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:22,655 INFO L225 Difference]: With dead ends: 243 [2020-12-23 16:58:22,655 INFO L226 Difference]: Without dead ends: 243 [2020-12-23 16:58:22,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:58:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-23 16:58:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2020-12-23 16:58:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-12-23 16:58:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 252 transitions. [2020-12-23 16:58:22,661 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 252 transitions. Word has length 187 [2020-12-23 16:58:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:22,661 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 252 transitions. [2020-12-23 16:58:22,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 16:58:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 252 transitions. [2020-12-23 16:58:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 16:58:22,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:22,662 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-23 16:58:22,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 16:58:22,863 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1795447145, now seen corresponding path program 30 times [2020-12-23 16:58:22,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:22,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300904398] [2020-12-23 16:58:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3148 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 16:58:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300904398] [2020-12-23 16:58:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025538628] [2020-12-23 16:58:23,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:24,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 16:58:24,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:58:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3148 backedges. 153 proven. 145 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2020-12-23 16:58:25,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:25,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 19] total 60 [2020-12-23 16:58:25,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736778068] [2020-12-23 16:58:25,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 16:58:25,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 16:58:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=2591, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 16:58:25,346 INFO L87 Difference]: Start difference. First operand 240 states and 252 transitions. Second operand 60 states. [2020-12-23 16:58:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:30,354 INFO L93 Difference]: Finished difference Result 255 states and 268 transitions. [2020-12-23 16:58:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 16:58:30,355 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 191 [2020-12-23 16:58:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:30,358 INFO L225 Difference]: With dead ends: 255 [2020-12-23 16:58:30,358 INFO L226 Difference]: Without dead ends: 255 [2020-12-23 16:58:30,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3118, Invalid=9538, Unknown=0, NotChecked=0, Total=12656 [2020-12-23 16:58:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-23 16:58:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2020-12-23 16:58:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-23 16:58:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 268 transitions. [2020-12-23 16:58:30,365 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 268 transitions. Word has length 191 [2020-12-23 16:58:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:30,365 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 268 transitions. [2020-12-23 16:58:30,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 16:58:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 268 transitions. [2020-12-23 16:58:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 16:58:30,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:30,367 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-23 16:58:30,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 16:58:30,581 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2032476873, now seen corresponding path program 31 times [2020-12-23 16:58:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:30,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842941938] [2020-12-23 16:58:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:31,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842941938] [2020-12-23 16:58:31,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266527068] [2020-12-23 16:58:31,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:31,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 16:58:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:32,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:32,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 16:58:32,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975352335] [2020-12-23 16:58:32,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 16:58:32,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 16:58:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:58:32,112 INFO L87 Difference]: Start difference. First operand 255 states and 268 transitions. Second operand 45 states. [2020-12-23 16:58:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:32,381 INFO L93 Difference]: Finished difference Result 262 states and 275 transitions. [2020-12-23 16:58:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 16:58:32,382 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 202 [2020-12-23 16:58:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:32,384 INFO L225 Difference]: With dead ends: 262 [2020-12-23 16:58:32,384 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 16:58:32,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:58:32,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 16:58:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2020-12-23 16:58:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 16:58:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 272 transitions. [2020-12-23 16:58:32,390 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 272 transitions. Word has length 202 [2020-12-23 16:58:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:32,391 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 272 transitions. [2020-12-23 16:58:32,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 16:58:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 272 transitions. [2020-12-23 16:58:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-23 16:58:32,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:32,392 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-23 16:58:32,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:32,596 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash 5080332, now seen corresponding path program 32 times [2020-12-23 16:58:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:32,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916154152] [2020-12-23 16:58:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3662 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:33,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916154152] [2020-12-23 16:58:33,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519111942] [2020-12-23 16:58:33,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:33,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:33,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:33,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 16:58:33,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3662 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:34,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:34,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 16:58:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454680260] [2020-12-23 16:58:34,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 16:58:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 16:58:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:58:34,208 INFO L87 Difference]: Start difference. First operand 259 states and 272 transitions. Second operand 46 states. [2020-12-23 16:58:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:34,466 INFO L93 Difference]: Finished difference Result 266 states and 279 transitions. [2020-12-23 16:58:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 16:58:34,467 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 206 [2020-12-23 16:58:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:34,469 INFO L225 Difference]: With dead ends: 266 [2020-12-23 16:58:34,469 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 16:58:34,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:58:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 16:58:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-12-23 16:58:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 16:58:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 276 transitions. [2020-12-23 16:58:34,475 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 276 transitions. Word has length 206 [2020-12-23 16:58:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:34,476 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 276 transitions. [2020-12-23 16:58:34,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 16:58:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 276 transitions. [2020-12-23 16:58:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-23 16:58:34,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:34,477 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-23 16:58:34,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:34,692 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash 472190415, now seen corresponding path program 33 times [2020-12-23 16:58:34,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:34,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260169537] [2020-12-23 16:58:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3831 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 16:58:35,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260169537] [2020-12-23 16:58:35,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843064399] [2020-12-23 16:58:35,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:36,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 16:58:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:58:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:36,154 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 [2020-12-23 16:58:36,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:36,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:36,162 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:36,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:58:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3831 backedges. 169 proven. 176 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2020-12-23 16:58:37,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:37,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 18] total 63 [2020-12-23 16:58:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128640774] [2020-12-23 16:58:37,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 16:58:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 16:58:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=2778, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 16:58:37,289 INFO L87 Difference]: Start difference. First operand 263 states and 276 transitions. Second operand 63 states. [2020-12-23 16:58:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:41,706 INFO L93 Difference]: Finished difference Result 280 states and 294 transitions. [2020-12-23 16:58:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 16:58:41,707 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 210 [2020-12-23 16:58:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:41,709 INFO L225 Difference]: With dead ends: 280 [2020-12-23 16:58:41,710 INFO L226 Difference]: Without dead ends: 280 [2020-12-23 16:58:41,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3520, Invalid=11000, Unknown=0, NotChecked=0, Total=14520 [2020-12-23 16:58:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-23 16:58:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 278. [2020-12-23 16:58:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 16:58:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 292 transitions. [2020-12-23 16:58:41,717 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 292 transitions. Word has length 210 [2020-12-23 16:58:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:41,718 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 292 transitions. [2020-12-23 16:58:41,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 16:58:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 292 transitions. [2020-12-23 16:58:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-23 16:58:41,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:41,720 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-23 16:58:41,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:41,934 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1419416773, now seen corresponding path program 34 times [2020-12-23 16:58:41,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:41,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787777516] [2020-12-23 16:58:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4215 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:43,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787777516] [2020-12-23 16:58:43,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797771610] [2020-12-23 16:58:43,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:46,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:46,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 16:58:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4215 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:46,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:46,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 16:58:46,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118083354] [2020-12-23 16:58:46,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 16:58:46,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 16:58:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:58:46,596 INFO L87 Difference]: Start difference. First operand 278 states and 292 transitions. Second operand 49 states. [2020-12-23 16:58:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:46,878 INFO L93 Difference]: Finished difference Result 285 states and 299 transitions. [2020-12-23 16:58:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 16:58:46,881 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 221 [2020-12-23 16:58:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:46,882 INFO L225 Difference]: With dead ends: 285 [2020-12-23 16:58:46,883 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 16:58:46,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:58:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 16:58:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-12-23 16:58:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-23 16:58:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 296 transitions. [2020-12-23 16:58:46,890 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 296 transitions. Word has length 221 [2020-12-23 16:58:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:46,890 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 296 transitions. [2020-12-23 16:58:46,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 16:58:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 296 transitions. [2020-12-23 16:58:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-23 16:58:46,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:46,892 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-23 16:58:47,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 16:58:47,105 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:58:47,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:47,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2145258914, now seen corresponding path program 35 times [2020-12-23 16:58:47,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:47,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480824229] [2020-12-23 16:58:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4396 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:58:48,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480824229] [2020-12-23 16:58:48,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149341447] [2020-12-23 16:58:48,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:22,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2020-12-23 16:59:22,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:22,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 16:59:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4396 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:59:22,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:22,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 16:59:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234765283] [2020-12-23 16:59:22,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:59:22,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:59:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:59:22,444 INFO L87 Difference]: Start difference. First operand 282 states and 296 transitions. Second operand 50 states. [2020-12-23 16:59:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:22,749 INFO L93 Difference]: Finished difference Result 289 states and 303 transitions. [2020-12-23 16:59:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 16:59:22,750 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 225 [2020-12-23 16:59:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:22,752 INFO L225 Difference]: With dead ends: 289 [2020-12-23 16:59:22,752 INFO L226 Difference]: Without dead ends: 289 [2020-12-23 16:59:22,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:59:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-23 16:59:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2020-12-23 16:59:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 16:59:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 300 transitions. [2020-12-23 16:59:22,759 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 300 transitions. Word has length 225 [2020-12-23 16:59:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:22,759 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 300 transitions. [2020-12-23 16:59:22,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:59:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 300 transitions. [2020-12-23 16:59:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-23 16:59:22,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:22,761 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-23 16:59:22,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:22,975 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:59:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -120598529, now seen corresponding path program 36 times [2020-12-23 16:59:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:22,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764057326] [2020-12-23 16:59:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4581 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 16:59:24,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764057326] [2020-12-23 16:59:24,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160396901] [2020-12-23 16:59:24,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:27,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 16:59:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:59:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4581 backedges. 139 proven. 210 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-12-23 16:59:29,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:29,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 19] total 68 [2020-12-23 16:59:29,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423626648] [2020-12-23 16:59:29,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 16:59:29,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:29,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 16:59:29,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=3227, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 16:59:29,323 INFO L87 Difference]: Start difference. First operand 286 states and 300 transitions. Second operand 68 states. [2020-12-23 16:59:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:41,241 INFO L93 Difference]: Finished difference Result 451 states and 481 transitions. [2020-12-23 16:59:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-12-23 16:59:41,242 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 229 [2020-12-23 16:59:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:41,245 INFO L225 Difference]: With dead ends: 451 [2020-12-23 16:59:41,245 INFO L226 Difference]: Without dead ends: 451 [2020-12-23 16:59:41,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=5374, Invalid=23356, Unknown=0, NotChecked=0, Total=28730 [2020-12-23 16:59:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-12-23 16:59:41,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 297. [2020-12-23 16:59:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-23 16:59:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 312 transitions. [2020-12-23 16:59:41,254 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 312 transitions. Word has length 229 [2020-12-23 16:59:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:41,255 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 312 transitions. [2020-12-23 16:59:41,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 16:59:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 312 transitions. [2020-12-23 16:59:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-23 16:59:41,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:41,256 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-23 16:59:41,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:41,470 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:59:41,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:41,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1508205986, now seen corresponding path program 37 times [2020-12-23 16:59:41,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:41,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046227993] [2020-12-23 16:59:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4807 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 16:59:43,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046227993] [2020-12-23 16:59:43,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147248460] [2020-12-23 16:59:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 16:59:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:43,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 16:59:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4807 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 16:59:43,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:43,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 16:59:43,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846796071] [2020-12-23 16:59:43,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 16:59:43,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 16:59:43,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 16:59:43,708 INFO L87 Difference]: Start difference. First operand 297 states and 312 transitions. Second operand 52 states. [2020-12-23 16:59:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:44,106 INFO L93 Difference]: Finished difference Result 304 states and 319 transitions. [2020-12-23 16:59:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 16:59:44,107 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 236 [2020-12-23 16:59:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:44,108 INFO L225 Difference]: With dead ends: 304 [2020-12-23 16:59:44,109 INFO L226 Difference]: Without dead ends: 304 [2020-12-23 16:59:44,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 16:59:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-23 16:59:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2020-12-23 16:59:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-23 16:59:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 316 transitions. [2020-12-23 16:59:44,114 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 316 transitions. Word has length 236 [2020-12-23 16:59:44,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:44,114 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 316 transitions. [2020-12-23 16:59:44,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 16:59:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 316 transitions. [2020-12-23 16:59:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-23 16:59:44,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:44,116 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-23 16:59:44,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 16:59:44,330 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:59:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1197779937, now seen corresponding path program 38 times [2020-12-23 16:59:44,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:44,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357638535] [2020-12-23 16:59:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 16:59:46,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357638535] [2020-12-23 16:59:46,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285300580] [2020-12-23 16:59:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 16:59:46,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:59:46,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 16:59:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 16:59:46,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:46,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 16:59:46,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031003599] [2020-12-23 16:59:46,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 16:59:46,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 16:59:46,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:59:46,631 INFO L87 Difference]: Start difference. First operand 301 states and 316 transitions. Second operand 53 states. [2020-12-23 16:59:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:46,980 INFO L93 Difference]: Finished difference Result 308 states and 323 transitions. [2020-12-23 16:59:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 16:59:46,981 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 240 [2020-12-23 16:59:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:46,983 INFO L225 Difference]: With dead ends: 308 [2020-12-23 16:59:46,983 INFO L226 Difference]: Without dead ends: 308 [2020-12-23 16:59:46,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:59:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-23 16:59:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 305. [2020-12-23 16:59:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-12-23 16:59:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 320 transitions. [2020-12-23 16:59:46,989 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 320 transitions. Word has length 240 [2020-12-23 16:59:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:46,989 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 320 transitions. [2020-12-23 16:59:46,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 16:59:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 320 transitions. [2020-12-23 16:59:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-23 16:59:46,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:46,991 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-23 16:59:47,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 16:59:47,208 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:59:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash 712262628, now seen corresponding path program 39 times [2020-12-23 16:59:47,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:47,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739800804] [2020-12-23 16:59:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5197 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 16:59:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739800804] [2020-12-23 16:59:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959655142] [2020-12-23 16:59:49,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:49,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 16:59:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:49,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:59:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:49,420 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 [2020-12-23 16:59:49,421 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:59:49,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:59:49,426 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:59:49,426 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:59:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5197 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2020-12-23 16:59:50,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:50,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 18] total 70 [2020-12-23 16:59:50,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997084130] [2020-12-23 16:59:50,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 16:59:50,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:50,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 16:59:50,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=3339, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:59:50,825 INFO L87 Difference]: Start difference. First operand 305 states and 320 transitions. Second operand 70 states. [2020-12-23 16:59:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:56,409 INFO L93 Difference]: Finished difference Result 321 states and 337 transitions. [2020-12-23 16:59:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 16:59:56,411 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 244 [2020-12-23 16:59:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:56,413 INFO L225 Difference]: With dead ends: 321 [2020-12-23 16:59:56,413 INFO L226 Difference]: Without dead ends: 321 [2020-12-23 16:59:56,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4531, Invalid=14101, Unknown=0, NotChecked=0, Total=18632 [2020-12-23 16:59:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-23 16:59:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-12-23 16:59:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-12-23 16:59:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 332 transitions. [2020-12-23 16:59:56,420 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 332 transitions. Word has length 244 [2020-12-23 16:59:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:56,420 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 332 transitions. [2020-12-23 16:59:56,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 16:59:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 332 transitions. [2020-12-23 16:59:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-23 16:59:56,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:56,422 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-23 16:59:56,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 16:59:56,638 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:59:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1203698701, now seen corresponding path program 40 times [2020-12-23 16:59:56,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:56,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509436973] [2020-12-23 16:59:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5438 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 16:59:58,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509436973] [2020-12-23 16:59:58,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654514181] [2020-12-23 16:59:58,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:05,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:00:05,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:00:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 17:00:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:00:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5438 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 17:00:05,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:00:05,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 17:00:05,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157152294] [2020-12-23 17:00:05,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 17:00:05,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:00:05,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 17:00:05,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 17:00:05,811 INFO L87 Difference]: Start difference. First operand 316 states and 332 transitions. Second operand 55 states. [2020-12-23 17:00:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:00:06,178 INFO L93 Difference]: Finished difference Result 323 states and 339 transitions. [2020-12-23 17:00:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 17:00:06,179 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 251 [2020-12-23 17:00:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:00:06,180 INFO L225 Difference]: With dead ends: 323 [2020-12-23 17:00:06,181 INFO L226 Difference]: Without dead ends: 323 [2020-12-23 17:00:06,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 17:00:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-23 17:00:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2020-12-23 17:00:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-23 17:00:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 336 transitions. [2020-12-23 17:00:06,187 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 336 transitions. Word has length 251 [2020-12-23 17:00:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:00:06,188 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 336 transitions. [2020-12-23 17:00:06,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 17:00:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 336 transitions. [2020-12-23 17:00:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-23 17:00:06,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:00:06,191 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-23 17:00:06,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:06,392 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:00:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:00:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash 924277776, now seen corresponding path program 41 times [2020-12-23 17:00:06,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:00:06,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392760908] [2020-12-23 17:00:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:00:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:00:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5643 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 17:00:08,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392760908] [2020-12-23 17:00:08,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280741533] [2020-12-23 17:00:08,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true