/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/memsafety-ext3/scopes3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:36:22,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:36:22,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:36:22,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:36:22,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:36:22,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:36:22,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:36:22,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:36:22,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:36:22,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:36:22,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:36:22,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:36:22,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:36:22,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:36:22,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:36:22,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:36:22,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:36:22,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:36:22,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:36:22,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:36:22,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:36:22,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:36:22,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:36:22,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:36:22,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:36:22,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:36:22,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:36:22,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:36:22,644 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 17:36:22,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:36:22,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:36:22,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:36:22,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:36:22,676 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:36:22,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:36:22,677 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:36:22,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:36:22,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:36:22,678 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:36:22,678 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:36:22,678 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:36:22,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:36:22,679 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:36:22,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:36:22,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:36:22,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:36:22,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:36:22,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:36:22,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:36:22,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:36:22,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:36:22,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:36:22,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:36:22,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:36:23,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:36:23,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:36:23,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:36:23,295 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:36:23,297 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:36:23,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-12-23 17:36:23,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/878a905ca/54e4fa8676044721aa04c3ba400704c3/FLAG44562755e [2020-12-23 17:36:24,108 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:36:24,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-12-23 17:36:24,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/878a905ca/54e4fa8676044721aa04c3ba400704c3/FLAG44562755e [2020-12-23 17:36:24,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/878a905ca/54e4fa8676044721aa04c3ba400704c3 [2020-12-23 17:36:24,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:36:24,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:36:24,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:36:24,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:36:24,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:36:24,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bdec0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24, skipping insertion in model container [2020-12-23 17:36:24,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:36:24,516 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] [2020-12-23 17:36:24,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:36:24,704 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] [2020-12-23 17:36:24,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:36:24,749 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:36:24,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24 WrapperNode [2020-12-23 17:36:24,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:36:24,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:36:24,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:36:24,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:36:24,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:36:24,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:36:24,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:36:24,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:36:24,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (1/1) ... [2020-12-23 17:36:24,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:36:24,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:36:24,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:36:24,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:36:24,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (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 17:36:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:36:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:36:24,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:36:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:36:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:36:25,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:36:25,267 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-23 17:36:25,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:36:25 BoogieIcfgContainer [2020-12-23 17:36:25,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:36:25,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:36:25,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:36:25,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:36:25,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:36:24" (1/3) ... [2020-12-23 17:36:25,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3462ff14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:36:25, skipping insertion in model container [2020-12-23 17:36:25,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:24" (2/3) ... [2020-12-23 17:36:25,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3462ff14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:36:25, skipping insertion in model container [2020-12-23 17:36:25,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:36:25" (3/3) ... [2020-12-23 17:36:25,285 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes3.c [2020-12-23 17:36:25,296 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:36:25,303 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-23 17:36:25,337 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-23 17:36:25,390 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:36:25,390 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:36:25,390 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:36:25,391 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:36:25,391 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:36:25,391 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:36:25,391 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:36:25,391 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:36:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-23 17:36:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:36:25,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:25,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:36:25,467 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash 925990, now seen corresponding path program 1 times [2020-12-23 17:36:25,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:25,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880284512] [2020-12-23 17:36:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:25,731 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 17:36:25,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880284512] [2020-12-23 17:36:25,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:36:25,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:36:25,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383444932] [2020-12-23 17:36:25,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 17:36:25,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 17:36:25,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:36:25,779 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-12-23 17:36:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:25,800 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 17:36:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 17:36:25,803 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-23 17:36:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:25,817 INFO L225 Difference]: With dead ends: 15 [2020-12-23 17:36:25,818 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 17:36:25,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:36:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 17:36:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 17:36:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 17:36:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 17:36:25,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2020-12-23 17:36:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:25,890 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 17:36:25,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 17:36:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 17:36:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:36:25,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:25,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:36:25,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:36:25,893 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:25,900 INFO L82 PathProgramCache]: Analyzing trace with hash 925711, now seen corresponding path program 1 times [2020-12-23 17:36:25,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:25,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597603082] [2020-12-23 17:36:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:25,997 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 17:36:25,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597603082] [2020-12-23 17:36:25,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:36:25,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:36:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281331204] [2020-12-23 17:36:26,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:36:26,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:36:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:36:26,003 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-12-23 17:36:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:26,032 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 17:36:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:36:26,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:36:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:26,035 INFO L225 Difference]: With dead ends: 18 [2020-12-23 17:36:26,035 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 17:36:26,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:36:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 17:36:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2020-12-23 17:36:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 17:36:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 17:36:26,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2020-12-23 17:36:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:26,042 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 17:36:26,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:36:26,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 17:36:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:36:26,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:26,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:36:26,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:36:26,044 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-23 17:36:26,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:26,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030295324] [2020-12-23 17:36:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:26,097 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 17:36:26,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030295324] [2020-12-23 17:36:26,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:36:26,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:36:26,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529823432] [2020-12-23 17:36:26,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:36:26,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:36:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:36:26,104 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-12-23 17:36:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:26,205 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 17:36:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:36:26,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:36:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:26,210 INFO L225 Difference]: With dead ends: 13 [2020-12-23 17:36:26,210 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 17:36:26,214 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 17:36:26,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 17:36:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 17:36:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 17:36:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 17:36:26,224 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2020-12-23 17:36:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:26,226 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 17:36:26,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:36:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 17:36:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:36:26,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:26,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:36:26,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:36:26,229 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:26,232 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-23 17:36:26,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:26,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19821828] [2020-12-23 17:36:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:26,360 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 17:36:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19821828] [2020-12-23 17:36:26,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:36:26,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:36:26,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936507681] [2020-12-23 17:36:26,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:36:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:36:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:36:26,367 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-12-23 17:36:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:26,386 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-23 17:36:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:36:26,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:36:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:26,388 INFO L225 Difference]: With dead ends: 11 [2020-12-23 17:36:26,388 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 17:36:26,389 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 17:36:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 17:36:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 17:36:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 17:36:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 17:36:26,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-12-23 17:36:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:26,393 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 17:36:26,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:36:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 17:36:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:36:26,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:26,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:26,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 17:36:26,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:26,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:26,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1809646231, now seen corresponding path program 1 times [2020-12-23 17:36:26,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:26,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040053558] [2020-12-23 17:36:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:26,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040053558] [2020-12-23 17:36:26,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608439036] [2020-12-23 17:36:26,439 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 17:36:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:26,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 17:36:26,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:26,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:26,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 17:36:26,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539885614] [2020-12-23 17:36:26,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:36:26,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:36:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:36:26,571 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2020-12-23 17:36:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:26,596 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 17:36:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:36:26,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 17:36:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:26,597 INFO L225 Difference]: With dead ends: 16 [2020-12-23 17:36:26,598 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 17:36:26,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:36:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 17:36:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-12-23 17:36:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 17:36:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 17:36:26,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2020-12-23 17:36:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:26,603 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 17:36:26,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:36:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 17:36:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 17:36:26,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:26,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-23 17:36:26,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:26,820 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash 742961935, now seen corresponding path program 2 times [2020-12-23 17:36:26,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:26,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679946814] [2020-12-23 17:36:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:26,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679946814] [2020-12-23 17:36:26,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919617496] [2020-12-23 17:36:26,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:27,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:36:27,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:27,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:36:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:27,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:27,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 17:36:27,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979552688] [2020-12-23 17:36:27,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:36:27,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:36:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:36:27,095 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-12-23 17:36:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:27,122 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-23 17:36:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:36:27,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 17:36:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:27,124 INFO L225 Difference]: With dead ends: 19 [2020-12-23 17:36:27,124 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 17:36:27,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:36:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 17:36:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-12-23 17:36:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 17:36:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 17:36:27,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-12-23 17:36:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:27,129 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 17:36:27,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:36:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 17:36:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 17:36:27,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:27,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1] [2020-12-23 17:36:27,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:27,346 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:27,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1614122903, now seen corresponding path program 3 times [2020-12-23 17:36:27,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:27,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406604852] [2020-12-23 17:36:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:27,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406604852] [2020-12-23 17:36:27,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553433011] [2020-12-23 17:36:27,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:27,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 17:36:27,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:36:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:27,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:27,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 17:36:27,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423298404] [2020-12-23 17:36:27,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:36:27,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:36:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:36:27,507 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-12-23 17:36:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:27,542 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 17:36:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:36:27,543 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 17:36:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:27,544 INFO L225 Difference]: With dead ends: 22 [2020-12-23 17:36:27,544 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 17:36:27,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 17:36:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 17:36:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-23 17:36:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 17:36:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 17:36:27,550 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2020-12-23 17:36:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:27,550 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 17:36:27,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:36:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 17:36:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 17:36:27,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:27,552 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2020-12-23 17:36:27,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:27,766 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:27,768 INFO L82 PathProgramCache]: Analyzing trace with hash -116849137, now seen corresponding path program 4 times [2020-12-23 17:36:27,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:27,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24557576] [2020-12-23 17:36:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:27,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24557576] [2020-12-23 17:36:27,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987383825] [2020-12-23 17:36:27,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:27,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:36:27,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:36:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:27,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:27,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 17:36:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683324819] [2020-12-23 17:36:27,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:36:27,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:27,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:36:27,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:36:27,972 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-12-23 17:36:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:27,999 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 17:36:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:36:28,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 17:36:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:28,001 INFO L225 Difference]: With dead ends: 25 [2020-12-23 17:36:28,001 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 17:36:28,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 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 17:36:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 17:36:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-23 17:36:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 17:36:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 17:36:28,006 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-12-23 17:36:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:28,006 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 17:36:28,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:36:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 17:36:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:36:28,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:28,008 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2020-12-23 17:36:28,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:28,222 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2127537001, now seen corresponding path program 5 times [2020-12-23 17:36:28,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:28,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095213012] [2020-12-23 17:36:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:28,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095213012] [2020-12-23 17:36:28,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210254284] [2020-12-23 17:36:28,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:28,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 17:36:28,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:36:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:28,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:28,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 17:36:28,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960887689] [2020-12-23 17:36:28,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:36:28,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:28,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:36:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:36:28,582 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-12-23 17:36:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:28,624 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 17:36:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:36:28,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-23 17:36:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:28,625 INFO L225 Difference]: With dead ends: 28 [2020-12-23 17:36:28,625 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 17:36:28,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 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 17:36:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 17:36:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-12-23 17:36:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 17:36:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-23 17:36:28,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 19 [2020-12-23 17:36:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:28,631 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-23 17:36:28,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:36:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-23 17:36:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 17:36:28,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:28,632 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1] [2020-12-23 17:36:28,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:28,847 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -620816113, now seen corresponding path program 6 times [2020-12-23 17:36:28,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:28,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526724842] [2020-12-23 17:36:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:28,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526724842] [2020-12-23 17:36:28,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268339086] [2020-12-23 17:36:28,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:29,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 17:36:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:36:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:29,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:29,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 17:36:29,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429720244] [2020-12-23 17:36:29,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 17:36:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 17:36:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:29,146 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-12-23 17:36:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:29,183 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 17:36:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:36:29,183 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 17:36:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:29,184 INFO L225 Difference]: With dead ends: 31 [2020-12-23 17:36:29,185 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 17:36:29,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 17:36:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-23 17:36:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 17:36:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 17:36:29,190 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2020-12-23 17:36:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:29,190 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 17:36:29,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 17:36:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 17:36:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 17:36:29,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:29,191 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1] [2020-12-23 17:36:29,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:29,405 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash -602052201, now seen corresponding path program 7 times [2020-12-23 17:36:29,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:29,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159158699] [2020-12-23 17:36:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:29,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159158699] [2020-12-23 17:36:29,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612328640] [2020-12-23 17:36:29,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:36:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:29,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:29,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 17:36:29,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083149311] [2020-12-23 17:36:29,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:36:29,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:36:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:36:29,783 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-12-23 17:36:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:29,835 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 17:36:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:36:29,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-23 17:36:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:29,837 INFO L225 Difference]: With dead ends: 34 [2020-12-23 17:36:29,838 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 17:36:29,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 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 17:36:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 17:36:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-12-23 17:36:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:36:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-23 17:36:29,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 25 [2020-12-23 17:36:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:29,844 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-23 17:36:29,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:36:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-23 17:36:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 17:36:29,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:29,846 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1] [2020-12-23 17:36:30,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:30,062 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 47901711, now seen corresponding path program 8 times [2020-12-23 17:36:30,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:30,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739837019] [2020-12-23 17:36:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:30,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739837019] [2020-12-23 17:36:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174241559] [2020-12-23 17:36:30,218 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 17:36:30,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:36:30,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:30,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 17:36:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:30,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:30,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 17:36:30,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385868060] [2020-12-23 17:36:30,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:36:30,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:30,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:36:30,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:36:30,375 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2020-12-23 17:36:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:30,440 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-23 17:36:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 17:36:30,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 17:36:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:30,441 INFO L225 Difference]: With dead ends: 37 [2020-12-23 17:36:30,441 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 17:36:30,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 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 17:36:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 17:36:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-12-23 17:36:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 17:36:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 17:36:30,447 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 28 [2020-12-23 17:36:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:30,447 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 17:36:30,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:36:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 17:36:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 17:36:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:30,449 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1] [2020-12-23 17:36:30,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 17:36:30,663 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:30,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1112323735, now seen corresponding path program 9 times [2020-12-23 17:36:30,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:30,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804231420] [2020-12-23 17:36:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:30,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804231420] [2020-12-23 17:36:30,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838799654] [2020-12-23 17:36:30,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:30,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 17:36:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:31,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:36:31,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:31,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:31,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 17:36:31,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22696543] [2020-12-23 17:36:31,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 17:36:31,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:31,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 17:36:31,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:36:31,099 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2020-12-23 17:36:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:31,146 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 17:36:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:36:31,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-12-23 17:36:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:31,148 INFO L225 Difference]: With dead ends: 38 [2020-12-23 17:36:31,148 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 17:36:31,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:36:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 17:36:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 17:36:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 17:36:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 17:36:31,152 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 31 [2020-12-23 17:36:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:31,153 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 17:36:31,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 17:36:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 17:36:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 17:36:31,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:31,155 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2020-12-23 17:36:31,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:31,368 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:31,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1565294351, now seen corresponding path program 10 times [2020-12-23 17:36:31,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:31,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582279116] [2020-12-23 17:36:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:36:31,407 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:36:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:36:31,439 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:36:31,469 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 17:36:31,469 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 17:36:31,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 17:36:31,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:36:31 BoogieIcfgContainer [2020-12-23 17:36:31,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:36:31,522 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:36:31,522 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:36:31,522 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:36:31,523 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:36:25" (3/4) ... [2020-12-23 17:36:31,525 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 17:36:31,637 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/memsafety-ext3/scopes3.c-witness.graphml [2020-12-23 17:36:31,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:36:31,640 INFO L168 Benchmark]: Toolchain (without parser) took 7167.61 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 129.7 MB in the beginning and 142.7 MB in the end (delta: -13.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:31,640 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 154.1 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:36:31,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.79 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 120.7 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:31,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.60 ms. Allocated memory is still 154.1 MB. Free memory was 120.5 MB in the beginning and 119.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:31,641 INFO L168 Benchmark]: Boogie Preprocessor took 28.49 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 118.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:31,642 INFO L168 Benchmark]: RCFGBuilder took 440.27 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 107.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:31,642 INFO L168 Benchmark]: TraceAbstraction took 6247.90 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 106.8 MB in the beginning and 145.3 MB in the end (delta: -38.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:36:31,643 INFO L168 Benchmark]: Witness Printer took 115.95 ms. Allocated memory is still 185.6 MB. Free memory was 145.3 MB in the beginning and 142.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:31,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 154.1 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.79 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 120.7 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.60 ms. Allocated memory is still 154.1 MB. Free memory was 120.5 MB in the beginning and 119.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.49 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 118.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 440.27 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 107.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6247.90 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 106.8 MB in the beginning and 145.3 MB in the end (delta: -38.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 115.95 ms. Allocated memory is still 185.6 MB. Free memory was 145.3 MB in the beginning and 142.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND FALSE !(i < 10) [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 123 SDslu, 286 SDs, 0 SdLazy, 192 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 20 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 392 NumberOfCodeBlocks, 388 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 19518 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1010 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/810 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...