/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/freeAlloca.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:43:08,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:43:08,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:43:08,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:43:08,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:43:08,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:43:08,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:43:08,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:43:08,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:43:08,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:43:08,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:43:08,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:43:08,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:43:08,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:43:08,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:43:08,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:43:08,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:43:08,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:43:08,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:43:08,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:43:08,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:43:08,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:43:08,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:43:08,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:43:08,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:43:08,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:43:08,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:43:08,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:43:08,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:43:08,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:43:08,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:43:08,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:43:08,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:43:08,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:43:08,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:43:08,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:43:08,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:43:08,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:43:08,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:43:08,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:43:08,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:43:08,586 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:43:08,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:43:08,588 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:43:08,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:43:08,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:43:08,589 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:43:08,590 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:43:08,591 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:43:08,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:43:08,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:43:08,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:43:08,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:43:08,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:43:08,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:43:08,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:43:08,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:43:08,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:43:08,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:43:08,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:43:08,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:43:08,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:43:09,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:43:09,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:43:09,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:43:09,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:43:09,091 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:43:09,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2020-12-22 19:43:09,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9f8706c/fea7a243d7c04469a24347759b904f7a/FLAG09eb70fad [2020-12-22 19:43:09,915 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:43:09,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2020-12-22 19:43:09,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9f8706c/fea7a243d7c04469a24347759b904f7a/FLAG09eb70fad [2020-12-22 19:43:10,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9f8706c/fea7a243d7c04469a24347759b904f7a [2020-12-22 19:43:10,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:43:10,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:43:10,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:43:10,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:43:10,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:43:10,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6754bf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10, skipping insertion in model container [2020-12-22 19:43:10,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:43:10,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:43:10,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:43:10,540 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:43:10,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:43:10,572 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:43:10,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10 WrapperNode [2020-12-22 19:43:10,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:43:10,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:43:10,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:43:10,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:43:10,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:43:10,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:43:10,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:43:10,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:43:10,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 19:43:10,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:43:10,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:43:10,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:43:10,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:43:10,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:43:10,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:43:10,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:43:10,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:43:10,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:43:10,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:43:10,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:43:10,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:43:10,991 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-22 19:43:10,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:10 BoogieIcfgContainer [2020-12-22 19:43:10,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:43:10,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:43:10,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:43:10,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:43:11,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:43:10" (1/3) ... [2020-12-22 19:43:11,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e70d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:11, skipping insertion in model container [2020-12-22 19:43:11,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (2/3) ... [2020-12-22 19:43:11,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e70d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:11, skipping insertion in model container [2020-12-22 19:43:11,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:10" (3/3) ... [2020-12-22 19:43:11,004 INFO L111 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2020-12-22 19:43:11,011 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:43:11,015 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-22 19:43:11,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-22 19:43:11,071 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:43:11,071 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:43:11,072 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:43:11,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:43:11,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:43:11,072 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:43:11,072 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:43:11,072 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:43:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 19:43:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:43:11,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:11,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:43:11,108 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2020-12-22 19:43:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:11,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560802382] [2020-12-22 19:43:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560802382] [2020-12-22 19:43:11,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:43:11,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:43:11,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158495] [2020-12-22 19:43:11,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 19:43:11,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:11,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 19:43:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 19:43:11,316 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-22 19:43:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:11,332 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-22 19:43:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 19:43:11,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-22 19:43:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:11,345 INFO L225 Difference]: With dead ends: 23 [2020-12-22 19:43:11,345 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 19:43:11,347 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 [2020-12-22 19:43:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 19:43:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 19:43:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 19:43:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-22 19:43:11,389 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 4 [2020-12-22 19:43:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:11,390 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-22 19:43:11,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 19:43:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-22 19:43:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:43:11,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:11,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:43:11,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:43:11,391 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2020-12-22 19:43:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:11,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204789287] [2020-12-22 19:43:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:11,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204789287] [2020-12-22 19:43:11,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:43:11,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:43:11,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949809246] [2020-12-22 19:43:11,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:43:11,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:43:11,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:43:11,445 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 3 states. [2020-12-22 19:43:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:11,471 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-22 19:43:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:43:11,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:43:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:11,473 INFO L225 Difference]: With dead ends: 27 [2020-12-22 19:43:11,473 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 19:43:11,476 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 [2020-12-22 19:43:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 19:43:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-22 19:43:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 19:43:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 19:43:11,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2020-12-22 19:43:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:11,483 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 19:43:11,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:43:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 19:43:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:43:11,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:11,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:43:11,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:43:11,485 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-22 19:43:11,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:11,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488397606] [2020-12-22 19:43:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:11,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488397606] [2020-12-22 19:43:11,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:43:11,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:43:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302044610] [2020-12-22 19:43:11,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:43:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:11,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:43:11,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:43:11,527 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2020-12-22 19:43:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:11,579 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-22 19:43:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:43:11,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:43:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:11,581 INFO L225 Difference]: With dead ends: 20 [2020-12-22 19:43:11,581 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 19:43:11,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:43:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 19:43:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 19:43:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 19:43:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 19:43:11,592 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2020-12-22 19:43:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:11,595 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 19:43:11,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:43:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 19:43:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:43:11,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:11,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:43:11,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:43:11,601 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-22 19:43:11,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:11,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802978049] [2020-12-22 19:43:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:11,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802978049] [2020-12-22 19:43:11,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:43:11,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:43:11,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799047888] [2020-12-22 19:43:11,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:43:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:43:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:43:11,711 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 3 states. [2020-12-22 19:43:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:11,746 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-22 19:43:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:43:11,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:43:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:11,747 INFO L225 Difference]: With dead ends: 22 [2020-12-22 19:43:11,748 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 19:43:11,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:43:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 19:43:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-22 19:43:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 19:43:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 19:43:11,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 4 [2020-12-22 19:43:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:11,753 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 19:43:11,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:43:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 19:43:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:43:11,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:11,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:11,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:43:11,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash 264435860, now seen corresponding path program 1 times [2020-12-22 19:43:11,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:11,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027952892] [2020-12-22 19:43:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:43:11,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027952892] [2020-12-22 19:43:11,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:43:11,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:43:11,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522412172] [2020-12-22 19:43:11,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:43:11,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:11,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:43:11,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:43:11,815 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-12-22 19:43:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:11,833 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-12-22 19:43:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:43:11,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 19:43:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:11,835 INFO L225 Difference]: With dead ends: 18 [2020-12-22 19:43:11,835 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 19:43:11,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:43:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 19:43:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 19:43:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 19:43:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 19:43:11,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-22 19:43:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:11,840 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 19:43:11,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:43:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 19:43:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:43:11,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:11,841 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:11,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:43:11,842 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2020-12-22 19:43:11,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:11,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546635623] [2020-12-22 19:43:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:11,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546635623] [2020-12-22 19:43:11,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584950837] [2020-12-22 19:43:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:43:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:12,055 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:43:12,057 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:43:12,064 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:43:12,066 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:43:12,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:43:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:12,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:12,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-22 19:43:12,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150360944] [2020-12-22 19:43:12,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:43:12,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:12,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:43:12,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:43:12,104 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-12-22 19:43:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:12,224 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-22 19:43:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:43:12,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 19:43:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:12,230 INFO L225 Difference]: With dead ends: 24 [2020-12-22 19:43:12,230 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 19:43:12,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:43:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 19:43:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 19:43:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 19:43:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 19:43:12,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2020-12-22 19:43:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:12,245 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 19:43:12,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:43:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 19:43:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 19:43:12,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:12,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:12,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 19:43:12,462 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1592079317, now seen corresponding path program 1 times [2020-12-22 19:43:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:12,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554740457] [2020-12-22 19:43:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554740457] [2020-12-22 19:43:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434725523] [2020-12-22 19:43:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:12,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 19:43:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:12,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:12,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 19:43:12,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513086690] [2020-12-22 19:43:12,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:43:12,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:43:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:43:12,659 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-12-22 19:43:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:12,700 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-22 19:43:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:43:12,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 19:43:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:12,702 INFO L225 Difference]: With dead ends: 31 [2020-12-22 19:43:12,703 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 19:43:12,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:43:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 19:43:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-12-22 19:43:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:43:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 19:43:12,708 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2020-12-22 19:43:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:12,709 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 19:43:12,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:43:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 19:43:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:43:12,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:12,710 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:12,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:12,925 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash 868187464, now seen corresponding path program 2 times [2020-12-22 19:43:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:12,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120489770] [2020-12-22 19:43:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:13,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120489770] [2020-12-22 19:43:13,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115568672] [2020-12-22 19:43:13,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:13,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:43:13,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:13,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:43:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:43:13,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:43:13,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 19:43:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060236282] [2020-12-22 19:43:13,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:43:13,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:13,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:43:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:43:13,227 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-12-22 19:43:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:13,266 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 19:43:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:43:13,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-22 19:43:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:13,269 INFO L225 Difference]: With dead ends: 30 [2020-12-22 19:43:13,270 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 19:43:13,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:43:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 19:43:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 19:43:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:43:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-22 19:43:13,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2020-12-22 19:43:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:13,282 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-22 19:43:13,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:43:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-22 19:43:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:43:13,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:13,284 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:13,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:13,498 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:13,500 INFO L82 PathProgramCache]: Analyzing trace with hash 868179519, now seen corresponding path program 1 times [2020-12-22 19:43:13,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:13,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623977664] [2020-12-22 19:43:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:13,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623977664] [2020-12-22 19:43:13,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925868362] [2020-12-22 19:43:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:13,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:43:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:13,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:13,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 19:43:13,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345598556] [2020-12-22 19:43:13,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:43:13,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:43:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:43:13,700 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2020-12-22 19:43:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:13,734 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-22 19:43:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:43:13,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-22 19:43:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:13,736 INFO L225 Difference]: With dead ends: 35 [2020-12-22 19:43:13,736 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 19:43:13,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:43:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 19:43:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-22 19:43:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 19:43:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-22 19:43:13,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 23 [2020-12-22 19:43:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:13,741 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-22 19:43:13,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:43:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-22 19:43:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 19:43:13,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:13,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:13,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:13,956 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1807992612, now seen corresponding path program 2 times [2020-12-22 19:43:13,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:13,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940600852] [2020-12-22 19:43:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:14,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940600852] [2020-12-22 19:43:14,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237198686] [2020-12-22 19:43:14,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:14,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:43:14,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:43:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:14,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:14,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 19:43:14,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053691957] [2020-12-22 19:43:14,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:43:14,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:43:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:43:14,129 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-12-22 19:43:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:14,168 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-22 19:43:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:43:14,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-22 19:43:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:14,170 INFO L225 Difference]: With dead ends: 39 [2020-12-22 19:43:14,170 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 19:43:14,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:43:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 19:43:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-22 19:43:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 19:43:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-22 19:43:14,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2020-12-22 19:43:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:14,175 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-22 19:43:14,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:43:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-22 19:43:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 19:43:14,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:14,176 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:14,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:43:14,391 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:14,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1600158969, now seen corresponding path program 3 times [2020-12-22 19:43:14,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:14,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828780089] [2020-12-22 19:43:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:14,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828780089] [2020-12-22 19:43:14,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473513810] [2020-12-22 19:43:14,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:14,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 19:43:14,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:43:14,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:14,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:14,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 19:43:14,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138687961] [2020-12-22 19:43:14,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:43:14,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:43:14,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:43:14,684 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 10 states. [2020-12-22 19:43:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:14,736 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-22 19:43:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:43:14,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-22 19:43:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:14,741 INFO L225 Difference]: With dead ends: 43 [2020-12-22 19:43:14,742 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 19:43:14,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:43:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 19:43:14,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-12-22 19:43:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 19:43:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-22 19:43:14,758 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 31 [2020-12-22 19:43:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:14,759 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-22 19:43:14,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:43:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-22 19:43:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 19:43:14,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:14,764 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:14,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:14,979 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:14,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:14,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1201968490, now seen corresponding path program 4 times [2020-12-22 19:43:14,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:14,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357121921] [2020-12-22 19:43:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:15,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357121921] [2020-12-22 19:43:15,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447408054] [2020-12-22 19:43:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:15,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:43:15,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:43:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:15,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:15,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 19:43:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009988219] [2020-12-22 19:43:15,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:43:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:43:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:43:15,209 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 11 states. [2020-12-22 19:43:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:15,257 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-22 19:43:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:43:15,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-22 19:43:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:15,259 INFO L225 Difference]: With dead ends: 47 [2020-12-22 19:43:15,259 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:43:15,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:43:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:43:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-22 19:43:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:43:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-22 19:43:15,263 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2020-12-22 19:43:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:15,264 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-22 19:43:15,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:43:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-22 19:43:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 19:43:15,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:15,265 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:15,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:15,480 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 414990771, now seen corresponding path program 5 times [2020-12-22 19:43:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:15,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076805767] [2020-12-22 19:43:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:15,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076805767] [2020-12-22 19:43:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974504734] [2020-12-22 19:43:15,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:15,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 19:43:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:43:15,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:15,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:15,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 19:43:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398185868] [2020-12-22 19:43:15,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:43:15,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:43:15,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:43:15,775 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 12 states. [2020-12-22 19:43:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:15,837 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-22 19:43:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:43:15,837 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-22 19:43:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:15,838 INFO L225 Difference]: With dead ends: 51 [2020-12-22 19:43:15,838 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:43:15,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:43:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:43:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-22 19:43:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:43:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-22 19:43:15,842 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 39 [2020-12-22 19:43:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:15,843 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-22 19:43:15,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:43:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-22 19:43:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 19:43:15,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:15,844 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:16,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 19:43:16,058 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash 544358992, now seen corresponding path program 6 times [2020-12-22 19:43:16,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:16,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241962058] [2020-12-22 19:43:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:43:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:16,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241962058] [2020-12-22 19:43:16,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789841849] [2020-12-22 19:43:16,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:16,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 19:43:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:43:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:43:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:43:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:43:16,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:43:16,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 19:43:16,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464135209] [2020-12-22 19:43:16,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:43:16,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:43:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:43:16,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:43:16,436 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 13 states. [2020-12-22 19:43:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:43:16,497 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 19:43:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:43:16,498 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-12-22 19:43:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:43:16,498 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:43:16,499 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:43:16,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:43:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:43:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:43:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:43:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-22 19:43:16,503 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2020-12-22 19:43:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:43:16,503 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-22 19:43:16,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:43:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-22 19:43:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:43:16,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:43:16,505 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:43:16,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:43:16,720 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:43:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:43:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1707912301, now seen corresponding path program 7 times [2020-12-22 19:43:16,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:43:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126769721] [2020-12-22 19:43:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:43:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 19:43:16,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 19:43:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 19:43:16,788 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 19:43:16,817 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 19:43:16,817 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 19:43:16,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 19:43:16,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:43:16 BoogieIcfgContainer [2020-12-22 19:43:16,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:43:16,860 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:43:16,860 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:43:16,860 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:43:16,861 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:10" (3/4) ... [2020-12-22 19:43:16,866 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 19:43:16,968 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/memsafety-ext3/freeAlloca.c-witness.graphml [2020-12-22 19:43:16,968 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:43:16,972 INFO L168 Benchmark]: Toolchain (without parser) took 6687.46 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 138.6 MB in the beginning and 124.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 48.6 MB. Max. memory is 8.0 GB. [2020-12-22 19:43:16,973 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 163.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:43:16,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.28 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 129.7 MB in the end (delta: 8.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 19:43:16,974 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.02 ms. Allocated memory is still 163.6 MB. Free memory was 129.7 MB in the beginning and 128.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:43:16,978 INFO L168 Benchmark]: Boogie Preprocessor took 26.86 ms. Allocated memory is still 163.6 MB. Free memory was 128.3 MB in the beginning and 127.3 MB in the end (delta: 942.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:43:16,978 INFO L168 Benchmark]: RCFGBuilder took 351.07 ms. Allocated memory is still 163.6 MB. Free memory was 127.2 MB in the beginning and 114.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 19:43:16,979 INFO L168 Benchmark]: TraceAbstraction took 5864.16 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 114.5 MB in the beginning and 127.4 MB in the end (delta: -12.9 MB). Peak memory consumption was 21.3 MB. Max. memory is 8.0 GB. [2020-12-22 19:43:16,979 INFO L168 Benchmark]: Witness Printer took 107.99 ms. Allocated memory is still 197.1 MB. Free memory was 127.4 MB in the beginning and 124.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:43:16,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 163.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.28 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 129.7 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 40.02 ms. Allocated memory is still 163.6 MB. Free memory was 129.7 MB in the beginning and 128.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.86 ms. Allocated memory is still 163.6 MB. Free memory was 128.3 MB in the beginning and 127.3 MB in the end (delta: 942.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.07 ms. Allocated memory is still 163.6 MB. Free memory was 127.2 MB in the beginning and 114.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5864.16 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 114.5 MB in the beginning and 127.4 MB in the end (delta: -12.9 MB). Peak memory consumption was 21.3 MB. Max. memory is 8.0 GB. * Witness Printer took 107.99 ms. Allocated memory is still 197.1 MB. Free memory was 127.4 MB in the beginning and 124.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND FALSE !(i < 10) [L13] EXPR p[2] [L13] COND TRUE p[2] == 'a' [L14] free(p) [L14] free(p) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 15, TraceHistogramMax: 10, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 184 SDtfs, 200 SDslu, 411 SDs, 0 SdLazy, 308 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 324 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=14, 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, 14 MinimizatonAttempts, 26 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 567 NumberOfCodeBlocks, 543 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 497 ConstructedInterpolants, 1 QuantifiedInterpolants, 44668 SizeOfPredicates, 2 NumberOfNonLiveVariables, 757 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 29/1097 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...