/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/derefAfterFree2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:35:51,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:35:51,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:35:51,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:35:51,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:35:51,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:35:51,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:35:51,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:35:51,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:35:51,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:35:51,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:35:51,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:35:51,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:35:51,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:35:51,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:35:51,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:35:51,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:35:51,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:35:51,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:35:51,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:35:51,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:35:51,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:35:51,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:35:51,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:35:51,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:35:51,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:35:51,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:35:51,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:35:51,587 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 17:35:51,622 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:35:51,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:35:51,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:35:51,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:35:51,625 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:35:51,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:35:51,626 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:35:51,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:35:51,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:35:51,626 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:35:51,627 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:35:51,627 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:35:51,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:35:51,628 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:35:51,628 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:35:51,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:35:51,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:35:51,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:35:51,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:35:51,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:35:51,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:35:51,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:35:51,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:35:51,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:35:51,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:35:52,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:35:52,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:35:52,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:35:52,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:35:52,148 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:35:52,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2020-12-23 17:35:52,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e65bf2cc2/5820363a568349958b240bdb423880c7/FLAG1750f3cc1 [2020-12-23 17:35:53,001 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:35:53,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2020-12-23 17:35:53,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e65bf2cc2/5820363a568349958b240bdb423880c7/FLAG1750f3cc1 [2020-12-23 17:35:53,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e65bf2cc2/5820363a568349958b240bdb423880c7 [2020-12-23 17:35:53,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:35:53,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:35:53,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:35:53,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:35:53,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:35:53,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc9613c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53, skipping insertion in model container [2020-12-23 17:35:53,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:35:53,400 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~p~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2020-12-23 17:35:53,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:35:53,694 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~p~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2020-12-23 17:35:53,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:35:53,749 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:35:53,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53 WrapperNode [2020-12-23 17:35:53,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:35:53,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:35:53,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:35:53,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:35:53,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:35:53,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:35:53,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:35:53,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:35:53,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (1/1) ... [2020-12-23 17:35:53,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:35:53,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:35:53,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:35:53,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:35:53,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (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 17:35:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:35:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 17:35:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:35:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:35:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:35:54,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:35:54,361 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-23 17:35:54,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:35:54 BoogieIcfgContainer [2020-12-23 17:35:54,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:35:54,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:35:54,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:35:54,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:35:54,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:35:53" (1/3) ... [2020-12-23 17:35:54,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6093f841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:35:54, skipping insertion in model container [2020-12-23 17:35:54,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:35:53" (2/3) ... [2020-12-23 17:35:54,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6093f841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:35:54, skipping insertion in model container [2020-12-23 17:35:54,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:35:54" (3/3) ... [2020-12-23 17:35:54,377 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2020-12-23 17:35:54,386 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:35:54,392 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-23 17:35:54,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-23 17:35:54,448 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:35:54,448 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:35:54,449 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:35:54,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:35:54,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:35:54,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:35:54,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:35:54,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:35:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 17:35:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:35:54,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:54,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:35:54,480 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:54,490 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-23 17:35:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:54,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045563102] [2020-12-23 17:35:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:54,771 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 17:35:54,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045563102] [2020-12-23 17:35:54,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:35:54,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:35:54,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891204476] [2020-12-23 17:35:54,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:35:54,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:54,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:35:54,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:35:54,807 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-23 17:35:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:54,873 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-23 17:35:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:35:54,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:35:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:54,889 INFO L225 Difference]: With dead ends: 27 [2020-12-23 17:35:54,889 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 17:35:54,892 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 17:35:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 17:35:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-12-23 17:35:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 17:35:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 17:35:54,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-12-23 17:35:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:54,988 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 17:35:54,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:35:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 17:35:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:35:54,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:54,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:35:54,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:35:54,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-23 17:35:54,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:55,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811102668] [2020-12-23 17:35:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:55,147 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 17:35:55,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811102668] [2020-12-23 17:35:55,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:35:55,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:35:55,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331750820] [2020-12-23 17:35:55,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:35:55,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:55,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:35:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:35:55,158 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 3 states. [2020-12-23 17:35:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:55,215 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-12-23 17:35:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:35:55,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:35:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:55,216 INFO L225 Difference]: With dead ends: 23 [2020-12-23 17:35:55,217 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 17:35:55,218 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 17:35:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 17:35:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 17:35:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 17:35:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 17:35:55,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2020-12-23 17:35:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:55,223 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 17:35:55,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:35:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 17:35:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 17:35:55,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:55,225 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:35:55,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:35:55,225 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:55,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:55,227 INFO L82 PathProgramCache]: Analyzing trace with hash 264743433, now seen corresponding path program 1 times [2020-12-23 17:35:55,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:55,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025665739] [2020-12-23 17:35:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:55,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025665739] [2020-12-23 17:35:55,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712299132] [2020-12-23 17:35:55,333 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 17:35:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:55,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 17:35:55,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:35:55,468 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:35:55,470 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:35:55,478 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:35:55,480 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:35:55,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 17:35:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:55,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:35:55,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-23 17:35:55,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82512054] [2020-12-23 17:35:55,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:35:55,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:55,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:35:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:35:55,521 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-12-23 17:35:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:55,654 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-23 17:35:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:35:55,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 17:35:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:55,667 INFO L225 Difference]: With dead ends: 26 [2020-12-23 17:35:55,667 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 17:35:55,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:35:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 17:35:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 17:35:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 17:35:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 17:35:55,682 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 8 [2020-12-23 17:35:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:55,683 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 17:35:55,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:35:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 17:35:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 17:35:55,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:55,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 17:35:55,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 17:35:55,902 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1943209927, now seen corresponding path program 1 times [2020-12-23 17:35:55,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:55,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925059767] [2020-12-23 17:35:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:56,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925059767] [2020-12-23 17:35:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516628882] [2020-12-23 17:35:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:35:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:56,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:35:56,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:35:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:56,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:35:56,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 17:35:56,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103227826] [2020-12-23 17:35:56,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:35:56,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:35:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:35:56,213 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-12-23 17:35:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:56,254 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-23 17:35:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:35:56,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 17:35:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:56,256 INFO L225 Difference]: With dead ends: 29 [2020-12-23 17:35:56,256 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 17:35:56,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 17:35:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 17:35:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 17:35:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 17:35:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 17:35:56,262 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-12-23 17:35:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:56,263 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 17:35:56,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:35:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 17:35:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:35:56,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:56,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 17:35:56,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:35:56,480 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -878417026, now seen corresponding path program 1 times [2020-12-23 17:35:56,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:56,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081164791] [2020-12-23 17:35:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:56,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081164791] [2020-12-23 17:35:56,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081810625] [2020-12-23 17:35:56,625 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 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 17:35:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:35:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:35:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:56,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:35:56,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 17:35:56,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354718169] [2020-12-23 17:35:56,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:35:56,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:35:56,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:35:56,728 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-12-23 17:35:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:56,790 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-23 17:35:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:35:56,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-23 17:35:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:56,792 INFO L225 Difference]: With dead ends: 33 [2020-12-23 17:35:56,792 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 17:35:56,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:35:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 17:35:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-23 17:35:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:35:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 17:35:56,799 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-12-23 17:35:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:56,799 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 17:35:56,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:35:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 17:35:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 17:35:56,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:56,801 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-23 17:35:57,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:35:57,017 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:57,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:57,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1922951525, now seen corresponding path program 2 times [2020-12-23 17:35:57,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:57,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091961820] [2020-12-23 17:35:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:57,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091961820] [2020-12-23 17:35:57,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804504407] [2020-12-23 17:35:57,114 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 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 17:35:57,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:35:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:35:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:35:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:35:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:57,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:35:57,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 17:35:57,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878305476] [2020-12-23 17:35:57,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:35:57,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:35:57,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:35:57,267 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-12-23 17:35:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:57,338 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-23 17:35:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:35:57,339 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 17:35:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:57,347 INFO L225 Difference]: With dead ends: 37 [2020-12-23 17:35:57,347 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 17:35:57,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 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 17:35:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 17:35:57,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-23 17:35:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 17:35:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 17:35:57,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2020-12-23 17:35:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:57,370 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 17:35:57,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:35:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 17:35:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 17:35:57,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:57,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-23 17:35:57,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:35:57,587 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1813320904, now seen corresponding path program 3 times [2020-12-23 17:35:57,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:57,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122975039] [2020-12-23 17:35:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:57,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122975039] [2020-12-23 17:35:57,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478500057] [2020-12-23 17:35:57,678 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 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 17:35:57,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 17:35:57,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:35:57,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:35:57,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:35:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:35:57,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:35:57,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 17:35:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281856492] [2020-12-23 17:35:57,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:35:57,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:57,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:35:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:35:57,789 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-12-23 17:35:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:57,850 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-12-23 17:35:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:35:57,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-23 17:35:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:57,852 INFO L225 Difference]: With dead ends: 40 [2020-12-23 17:35:57,853 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 17:35:57,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 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 17:35:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 17:35:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 17:35:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 17:35:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-23 17:35:57,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-12-23 17:35:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:57,859 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-23 17:35:57,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:35:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-23 17:35:57,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 17:35:57,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:57,860 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2020-12-23 17:35:58,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 17:35:58,074 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1156599646, now seen corresponding path program 2 times [2020-12-23 17:35:58,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:58,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784370354] [2020-12-23 17:35:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:35:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 17:35:58,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784370354] [2020-12-23 17:35:58,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:35:58,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:35:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206776353] [2020-12-23 17:35:58,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:35:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:35:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:35:58,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:35:58,186 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2020-12-23 17:35:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:35:58,195 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 17:35:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:35:58,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-23 17:35:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:35:58,197 INFO L225 Difference]: With dead ends: 39 [2020-12-23 17:35:58,197 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 17:35:58,198 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 17:35:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 17:35:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 17:35:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 17:35:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-23 17:35:58,202 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 27 [2020-12-23 17:35:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:35:58,203 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-23 17:35:58,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:35:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-23 17:35:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 17:35:58,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:35:58,204 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:35:58,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 17:35:58,205 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-23 17:35:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:35:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1418335515, now seen corresponding path program 1 times [2020-12-23 17:35:58,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:35:58,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805465569] [2020-12-23 17:35:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:35:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:35:58,234 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:35:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:35:58,256 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:35:58,287 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 17:35:58,287 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 17:35:58,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 17:35:58,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:35:58 BoogieIcfgContainer [2020-12-23 17:35:58,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:35:58,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:35:58,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:35:58,335 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:35:58,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:35:54" (3/4) ... [2020-12-23 17:35:58,339 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 17:35:58,401 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/memsafety-ext3/derefAfterFree2.c-witness.graphml [2020-12-23 17:35:58,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:35:58,404 INFO L168 Benchmark]: Toolchain (without parser) took 5047.29 ms. Allocated memory was 156.2 MB in the beginning and 197.1 MB in the end (delta: 40.9 MB). Free memory was 131.4 MB in the beginning and 87.0 MB in the end (delta: 44.4 MB). Peak memory consumption was 85.9 MB. Max. memory is 8.0 GB. [2020-12-23 17:35:58,405 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:35:58,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.29 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 122.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:35:58,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.02 ms. Allocated memory is still 156.2 MB. Free memory was 122.4 MB in the beginning and 121.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:35:58,407 INFO L168 Benchmark]: Boogie Preprocessor took 64.68 ms. Allocated memory is still 156.2 MB. Free memory was 121.1 MB in the beginning and 120.1 MB in the end (delta: 925.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:35:58,408 INFO L168 Benchmark]: RCFGBuilder took 480.25 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 108.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 17:35:58,409 INFO L168 Benchmark]: TraceAbstraction took 3967.02 ms. Allocated memory was 156.2 MB in the beginning and 197.1 MB in the end (delta: 40.9 MB). Free memory was 108.2 MB in the beginning and 89.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 8.0 GB. [2020-12-23 17:35:58,410 INFO L168 Benchmark]: Witness Printer took 67.27 ms. Allocated memory is still 197.1 MB. Free memory was 89.1 MB in the beginning and 87.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:35:58,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 391.29 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 122.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 63.02 ms. Allocated memory is still 156.2 MB. Free memory was 122.4 MB in the beginning and 121.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.68 ms. Allocated memory is still 156.2 MB. Free memory was 121.1 MB in the beginning and 120.1 MB in the end (delta: 925.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 480.25 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 108.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3967.02 ms. Allocated memory was 156.2 MB in the beginning and 197.1 MB in the end (delta: 40.9 MB). Free memory was 108.2 MB in the beginning and 89.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 8.0 GB. * Witness Printer took 67.27 ms. Allocated memory is still 197.1 MB. Free memory was 89.1 MB in the beginning and 87.0 MB in the end (delta: 2.1 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: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND TRUE i == 5 [L11] free(p) [L11] free(p) [L11] free(p) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 102 SDslu, 154 SDs, 0 SdLazy, 206 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 12107 SizeOfPredicates, 2 NumberOfNonLiveVariables, 275 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 55/255 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...