/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/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:57:38,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:57:38,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:57:38,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:57:38,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:57:38,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:57:38,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:57:38,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:57:38,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:57:38,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:57:38,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:57:38,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:57:38,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:57:38,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:57:38,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:57:38,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:57:38,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:57:38,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:57:38,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:57:38,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:57:38,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:57:38,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:57:38,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:57:38,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:57:38,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:57:38,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:57:38,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:57:38,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:57:38,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:57:38,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:57:38,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:57:38,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:57:38,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:57:38,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:57:38,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:57:38,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:57:38,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:57:38,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:57:38,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:57:38,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:57:38,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:57:38,785 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:57:38,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:57:38,786 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:57:38,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:57:38,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:57:38,786 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:57:38,787 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:57:38,788 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:57:38,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:57:38,788 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:57:38,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:57:38,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:57:38,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:57:38,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:57:38,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:38,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:57:38,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:57:38,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:57:38,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:57:38,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:57:38,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:57:39,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:57:39,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:57:39,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:57:39,237 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:57:39,240 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:57:39,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-12-23 16:57:39,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2db170856/43c95d5756d64ce98efd18e6619f04c7/FLAG27d1a6c5d [2020-12-23 16:57:39,992 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:57:39,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-12-23 16:57:40,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2db170856/43c95d5756d64ce98efd18e6619f04c7/FLAG27d1a6c5d [2020-12-23 16:57:40,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2db170856/43c95d5756d64ce98efd18e6619f04c7 [2020-12-23 16:57:40,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:57:40,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:57:40,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:40,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:57:40,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:57:40,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7997ea82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40, skipping insertion in model container [2020-12-23 16:57:40,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:57:40,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 16:57:40,577 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2020-12-23 16:57:40,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:40,625 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 16:57:40,642 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2020-12-23 16:57:40,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:40,679 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:57:40,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40 WrapperNode [2020-12-23 16:57:40,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:40,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:40,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:57:40,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:57:40,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:40,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:57:40,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:57:40,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:57:40,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... [2020-12-23 16:57:40,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:57:40,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:57:40,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:57:40,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:57:40,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 16:57:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-23 16:57:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-23 16:57:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:57:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:57:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:57:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:57:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:57:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:57:41,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:57:41,536 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-23 16:57:41,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:41 BoogieIcfgContainer [2020-12-23 16:57:41,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:57:41,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:57:41,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:57:41,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:57:41,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:57:40" (1/3) ... [2020-12-23 16:57:41,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61757cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:41, skipping insertion in model container [2020-12-23 16:57:41,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:40" (2/3) ... [2020-12-23 16:57:41,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61757cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:41, skipping insertion in model container [2020-12-23 16:57:41,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:41" (3/3) ... [2020-12-23 16:57:41,550 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-12-23 16:57:41,558 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:57:41,566 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-23 16:57:41,593 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-23 16:57:41,626 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:57:41,627 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:57:41,627 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:57:41,627 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:57:41,627 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:57:41,627 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:57:41,628 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:57:41,628 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:57:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-12-23 16:57:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:57:41,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:41,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:41,716 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1701045346, now seen corresponding path program 1 times [2020-12-23 16:57:41,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:41,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274626563] [2020-12-23 16:57:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:41,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274626563] [2020-12-23 16:57:41,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:41,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:41,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311361810] [2020-12-23 16:57:41,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 16:57:41,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 16:57:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 16:57:41,972 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-12-23 16:57:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:42,000 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-23 16:57:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 16:57:42,002 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-23 16:57:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:42,014 INFO L225 Difference]: With dead ends: 61 [2020-12-23 16:57:42,014 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 16:57:42,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 16:57:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 16:57:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 16:57:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:57:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-23 16:57:42,072 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 12 [2020-12-23 16:57:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:42,072 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-23 16:57:42,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 16:57:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-23 16:57:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:57:42,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:42,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:42,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:57:42,079 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:42,084 INFO L82 PathProgramCache]: Analyzing trace with hash 498671710, now seen corresponding path program 1 times [2020-12-23 16:57:42,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:42,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186392129] [2020-12-23 16:57:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:42,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186392129] [2020-12-23 16:57:42,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:42,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:57:42,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619828994] [2020-12-23 16:57:42,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:42,317 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 5 states. [2020-12-23 16:57:42,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:42,658 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-23 16:57:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:57:42,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 16:57:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:42,664 INFO L225 Difference]: With dead ends: 108 [2020-12-23 16:57:42,665 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 16:57:42,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 16:57:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2020-12-23 16:57:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 16:57:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2020-12-23 16:57:42,685 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 12 [2020-12-23 16:57:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:42,685 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2020-12-23 16:57:42,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2020-12-23 16:57:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:57:42,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:42,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:42,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:57:42,687 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:42,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1812361920, now seen corresponding path program 1 times [2020-12-23 16:57:42,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:42,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353362316] [2020-12-23 16:57:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:42,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 16:57:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:42,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353362316] [2020-12-23 16:57:42,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:42,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:42,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122939551] [2020-12-23 16:57:42,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:42,778 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 4 states. [2020-12-23 16:57:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:42,907 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-12-23 16:57:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:42,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 16:57:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:42,909 INFO L225 Difference]: With dead ends: 76 [2020-12-23 16:57:42,910 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 16:57:42,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 16:57:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-23 16:57:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:57:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-12-23 16:57:42,921 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 14 [2020-12-23 16:57:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:42,921 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-12-23 16:57:42,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-12-23 16:57:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:57:42,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:42,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:42,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:57:42,923 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1812361919, now seen corresponding path program 1 times [2020-12-23 16:57:42,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:42,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36064826] [2020-12-23 16:57:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:43,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 16:57:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:43,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36064826] [2020-12-23 16:57:43,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:43,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:57:43,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160302311] [2020-12-23 16:57:43,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:57:43,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:57:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:43,202 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 7 states. [2020-12-23 16:57:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:43,305 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-12-23 16:57:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:43,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 16:57:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:43,307 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:57:43,307 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:57:43,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:57:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-23 16:57:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 16:57:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-12-23 16:57:43,318 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 14 [2020-12-23 16:57:43,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:43,319 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-12-23 16:57:43,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:57:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-12-23 16:57:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:57:43,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:43,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:43,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:57:43,321 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:43,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -359056604, now seen corresponding path program 1 times [2020-12-23 16:57:43,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:43,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585541942] [2020-12-23 16:57:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:43,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585541942] [2020-12-23 16:57:43,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:43,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:57:43,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944889154] [2020-12-23 16:57:43,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:57:43,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:57:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:57:43,442 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 6 states. [2020-12-23 16:57:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:43,577 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-12-23 16:57:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:43,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 16:57:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:43,579 INFO L225 Difference]: With dead ends: 70 [2020-12-23 16:57:43,579 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 16:57:43,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 16:57:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-23 16:57:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 16:57:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-12-23 16:57:43,589 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 15 [2020-12-23 16:57:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:43,590 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-12-23 16:57:43,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:57:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-12-23 16:57:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:57:43,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:43,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:43,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:57:43,592 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash -359056603, now seen corresponding path program 1 times [2020-12-23 16:57:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:43,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396769866] [2020-12-23 16:57:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:43,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396769866] [2020-12-23 16:57:43,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:43,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:57:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961606223] [2020-12-23 16:57:43,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:57:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:43,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:57:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:43,780 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 7 states. [2020-12-23 16:57:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:44,132 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2020-12-23 16:57:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:57:44,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 16:57:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:44,136 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:57:44,136 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:57:44,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:57:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:57:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-12-23 16:57:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 16:57:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-12-23 16:57:44,168 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 15 [2020-12-23 16:57:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:44,168 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-12-23 16:57:44,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:57:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-12-23 16:57:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:57:44,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:44,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:44,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:57:44,175 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:44,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2076916866, now seen corresponding path program 1 times [2020-12-23 16:57:44,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:44,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14743532] [2020-12-23 16:57:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:44,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 16:57:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14743532] [2020-12-23 16:57:44,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:44,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:57:44,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422872043] [2020-12-23 16:57:44,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:57:44,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:57:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:44,327 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2020-12-23 16:57:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:44,572 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2020-12-23 16:57:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:57:44,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 16:57:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:44,575 INFO L225 Difference]: With dead ends: 111 [2020-12-23 16:57:44,575 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 16:57:44,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 16:57:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2020-12-23 16:57:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:57:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-12-23 16:57:44,585 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 16 [2020-12-23 16:57:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:44,585 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-12-23 16:57:44,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:57:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-12-23 16:57:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:57:44,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:44,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:44,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:57:44,587 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1754147206, now seen corresponding path program 1 times [2020-12-23 16:57:44,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:44,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580118377] [2020-12-23 16:57:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580118377] [2020-12-23 16:57:44,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:44,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:57:44,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527390580] [2020-12-23 16:57:44,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:57:44,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:57:44,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:44,729 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 8 states. [2020-12-23 16:57:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:45,060 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-12-23 16:57:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:57:45,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 16:57:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:45,062 INFO L225 Difference]: With dead ends: 93 [2020-12-23 16:57:45,062 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 16:57:45,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 16:57:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-12-23 16:57:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:57:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-12-23 16:57:45,070 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 16 [2020-12-23 16:57:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:45,070 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-12-23 16:57:45,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:57:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-12-23 16:57:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:57:45,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:45,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:45,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:57:45,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:45,073 INFO L82 PathProgramCache]: Analyzing trace with hash 131457149, now seen corresponding path program 1 times [2020-12-23 16:57:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:45,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78780576] [2020-12-23 16:57:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 16:57:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78780576] [2020-12-23 16:57:45,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:45,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:57:45,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408008829] [2020-12-23 16:57:45,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:57:45,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:45,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:57:45,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:45,210 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 9 states. [2020-12-23 16:57:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:45,416 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-12-23 16:57:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:57:45,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-23 16:57:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:45,433 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:57:45,433 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:57:45,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:57:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-23 16:57:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 16:57:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-12-23 16:57:45,443 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 19 [2020-12-23 16:57:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:45,446 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-12-23 16:57:45,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:57:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-12-23 16:57:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:57:45,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:45,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:45,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:57:45,448 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:45,449 INFO L82 PathProgramCache]: Analyzing trace with hash -219791608, now seen corresponding path program 1 times [2020-12-23 16:57:45,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:45,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849331637] [2020-12-23 16:57:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 16:57:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:45,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849331637] [2020-12-23 16:57:45,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:45,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:45,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095448037] [2020-12-23 16:57:45,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:45,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:45,500 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 4 states. [2020-12-23 16:57:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:45,532 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-12-23 16:57:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:45,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 16:57:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:45,534 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:57:45,534 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:57:45,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:57:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-23 16:57:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 16:57:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-12-23 16:57:45,540 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 20 [2020-12-23 16:57:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:45,540 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-12-23 16:57:45,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-12-23 16:57:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:57:45,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:45,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:45,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:57:45,542 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash -207239485, now seen corresponding path program 1 times [2020-12-23 16:57:45,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:45,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870058572] [2020-12-23 16:57:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870058572] [2020-12-23 16:57:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052393397] [2020-12-23 16:57:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 16:57:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:45,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:45,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 16:57:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071727257] [2020-12-23 16:57:45,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:57:45,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:57:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:57:45,927 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 10 states. [2020-12-23 16:57:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:46,295 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-23 16:57:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:57:46,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 16:57:46,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:46,298 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:57:46,298 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:57:46,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:57:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:57:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-12-23 16:57:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 16:57:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-12-23 16:57:46,305 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 22 [2020-12-23 16:57:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:46,305 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-12-23 16:57:46,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:57:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-12-23 16:57:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:57:46,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:46,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 16:57:46,521 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash -766335477, now seen corresponding path program 1 times [2020-12-23 16:57:46,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:46,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113855682] [2020-12-23 16:57:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 16:57:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:46,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113855682] [2020-12-23 16:57:46,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:46,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:57:46,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812903383] [2020-12-23 16:57:46,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:46,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:46,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:46,641 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 5 states. [2020-12-23 16:57:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:46,708 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-12-23 16:57:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:46,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-23 16:57:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:46,710 INFO L225 Difference]: With dead ends: 70 [2020-12-23 16:57:46,710 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 16:57:46,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 16:57:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 16:57:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 16:57:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-12-23 16:57:46,715 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 22 [2020-12-23 16:57:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:46,715 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-12-23 16:57:46,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-12-23 16:57:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:57:46,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,717 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:46,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 16:57:46,717 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1588183672, now seen corresponding path program 1 times [2020-12-23 16:57:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:46,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746536224] [2020-12-23 16:57:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 16:57:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:46,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746536224] [2020-12-23 16:57:46,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325391217] [2020-12-23 16:57:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:57:46,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:47,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2020-12-23 16:57:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364308032] [2020-12-23 16:57:47,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:57:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:57:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:57:47,533 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 19 states. [2020-12-23 16:57:48,123 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-23 16:57:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:48,546 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2020-12-23 16:57:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:57:48,547 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-12-23 16:57:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:48,548 INFO L225 Difference]: With dead ends: 130 [2020-12-23 16:57:48,548 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 16:57:48,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:57:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 16:57:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2020-12-23 16:57:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 16:57:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2020-12-23 16:57:48,557 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 24 [2020-12-23 16:57:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:48,557 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2020-12-23 16:57:48,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:57:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2020-12-23 16:57:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:57:48,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:48,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:48,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 16:57:48,772 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1999585632, now seen corresponding path program 1 times [2020-12-23 16:57:48,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:48,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281078913] [2020-12-23 16:57:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:48,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281078913] [2020-12-23 16:57:48,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153319247] [2020-12-23 16:57:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:57:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:49,088 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 8 treesize of output 7 [2020-12-23 16:57:49,090 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:49,096 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:49,097 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:49,098 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-23 16:57:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:49,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:49,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-12-23 16:57:49,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121921201] [2020-12-23 16:57:49,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:57:49,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:57:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:57:49,354 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand 17 states. [2020-12-23 16:57:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:50,075 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2020-12-23 16:57:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:57:50,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-12-23 16:57:50,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:50,077 INFO L225 Difference]: With dead ends: 146 [2020-12-23 16:57:50,078 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 16:57:50,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:57:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 16:57:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 97. [2020-12-23 16:57:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 16:57:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-12-23 16:57:50,085 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 25 [2020-12-23 16:57:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:50,086 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-12-23 16:57:50,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:57:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-12-23 16:57:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:57:50,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:50,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:50,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:57:50,301 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:50,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1531117911, now seen corresponding path program 1 times [2020-12-23 16:57:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:50,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750374131] [2020-12-23 16:57:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 16:57:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:50,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750374131] [2020-12-23 16:57:50,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590668546] [2020-12-23 16:57:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:57:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:51,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:51,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2020-12-23 16:57:51,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187633214] [2020-12-23 16:57:51,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:57:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:51,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:57:51,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:57:51,111 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 25 states. [2020-12-23 16:57:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:53,189 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2020-12-23 16:57:53,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:57:53,190 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2020-12-23 16:57:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:53,199 INFO L225 Difference]: With dead ends: 194 [2020-12-23 16:57:53,199 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 16:57:53,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:57:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 16:57:53,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 118. [2020-12-23 16:57:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 16:57:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-12-23 16:57:53,228 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 26 [2020-12-23 16:57:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:53,228 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-12-23 16:57:53,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:57:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-12-23 16:57:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:57:53,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:53,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:53,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:53,444 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:53,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1857612437, now seen corresponding path program 1 times [2020-12-23 16:57:53,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:53,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140460245] [2020-12-23 16:57:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:53,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140460245] [2020-12-23 16:57:53,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538030243] [2020-12-23 16:57:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:57:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:53,676 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 8 treesize of output 7 [2020-12-23 16:57:53,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:53,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:53,682 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:53,682 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-23 16:57:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:54,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:54,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-12-23 16:57:54,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104855415] [2020-12-23 16:57:54,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:57:54,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:57:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:57:54,046 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 17 states. [2020-12-23 16:57:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:54,740 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2020-12-23 16:57:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:57:54,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-12-23 16:57:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:54,743 INFO L225 Difference]: With dead ends: 165 [2020-12-23 16:57:54,743 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 16:57:54,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:57:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 16:57:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2020-12-23 16:57:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 16:57:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-12-23 16:57:54,751 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 26 [2020-12-23 16:57:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:54,752 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-12-23 16:57:54,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:57:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-12-23 16:57:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:57:54,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:54,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:54,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:57:54,966 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1924144921, now seen corresponding path program 1 times [2020-12-23 16:57:54,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:54,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357412111] [2020-12-23 16:57:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 16:57:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:55,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357412111] [2020-12-23 16:57:55,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373322882] [2020-12-23 16:57:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:57:55,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:55,127 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 6 [2020-12-23 16:57:55,128 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:55,130 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:55,131 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:55,131 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-12-23 16:57:55,181 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2020-12-23 16:57:55,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:55,188 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:55,190 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:57:55,190 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-12-23 16:57:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:55,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:55,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2020-12-23 16:57:55,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861833842] [2020-12-23 16:57:55,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:57:55,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:57:55,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:57:55,222 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 8 states. [2020-12-23 16:57:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:55,371 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-12-23 16:57:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:57:55,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-23 16:57:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:55,374 INFO L225 Difference]: With dead ends: 64 [2020-12-23 16:57:55,374 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 16:57:55,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:57:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 16:57:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 16:57:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:57:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-23 16:57:55,377 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 26 [2020-12-23 16:57:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:55,378 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-23 16:57:55,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:57:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-23 16:57:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:57:55,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:55,379 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:55,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:57:55,593 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:57:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash -980974189, now seen corresponding path program 1 times [2020-12-23 16:57:55,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:55,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701280579] [2020-12-23 16:57:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 16:57:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:55,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701280579] [2020-12-23 16:57:55,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356598825] [2020-12-23 16:57:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 16:57:55,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:55,916 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 6 [2020-12-23 16:57:55,917 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:55,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:55,923 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:55,923 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2020-12-23 16:58:02,194 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2020-12-23 16:58:02,196 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:02,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:02,206 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:58:02,207 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-12-23 16:58:02,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:58:02,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:58:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:02,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:02,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2020-12-23 16:58:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290511962] [2020-12-23 16:58:02,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:58:02,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:58:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=394, Unknown=3, NotChecked=0, Total=462 [2020-12-23 16:58:02,295 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 22 states. [2020-12-23 16:58:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:04,889 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-12-23 16:58:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:58:04,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-12-23 16:58:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:04,890 INFO L225 Difference]: With dead ends: 62 [2020-12-23 16:58:04,890 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 16:58:04,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=152, Invalid=715, Unknown=3, NotChecked=0, Total=870 [2020-12-23 16:58:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 16:58:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 16:58:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 16:58:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-12-23 16:58:04,894 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 29 [2020-12-23 16:58:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:04,894 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-12-23 16:58:04,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:58:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-12-23 16:58:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 16:58:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:04,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:05,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:58:05,110 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:58:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969094, now seen corresponding path program 1 times [2020-12-23 16:58:05,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:05,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774347802] [2020-12-23 16:58:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 16:58:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 16:58:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:58:05,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774347802] [2020-12-23 16:58:05,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591868356] [2020-12-23 16:58:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:05,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 16:58:05,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:05,485 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 8 treesize of output 7 [2020-12-23 16:58:05,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:05,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:05,492 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:05,493 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-23 16:58:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:58:06,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:06,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2020-12-23 16:58:06,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701925367] [2020-12-23 16:58:06,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:58:06,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:58:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:58:06,200 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 25 states. [2020-12-23 16:58:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:08,536 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-12-23 16:58:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:58:08,537 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2020-12-23 16:58:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:08,538 INFO L225 Difference]: With dead ends: 71 [2020-12-23 16:58:08,538 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 16:58:08,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:58:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 16:58:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-23 16:58:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:58:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 16:58:08,541 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 35 [2020-12-23 16:58:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:08,542 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 16:58:08,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:58:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 16:58:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 16:58:08,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:08,543 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:08,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:08,744 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-23 16:58:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1205791223, now seen corresponding path program 1 times [2020-12-23 16:58:08,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:08,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098726372] [2020-12-23 16:58:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:08,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 16:58:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:09,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 16:58:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:58:09,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098726372] [2020-12-23 16:58:09,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520261734] [2020-12-23 16:58:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:09,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:58:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:58:09,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:09,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2020-12-23 16:58:09,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045052192] [2020-12-23 16:58:09,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:58:09,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:58:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:58:09,719 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 30 states. [2020-12-23 16:58:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:11,373 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-23 16:58:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:58:11,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 45 [2020-12-23 16:58:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:11,374 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:58:11,374 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 16:58:11,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:58:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 16:58:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 16:58:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 16:58:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 16:58:11,377 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-12-23 16:58:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:11,377 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 16:58:11,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:58:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 16:58:11,377 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 16:58:11,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:11,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:58:11 BoogieIcfgContainer [2020-12-23 16:58:11,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:58:11,598 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:58:11,598 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:58:11,598 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:58:11,598 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:41" (3/4) ... [2020-12-23 16:58:11,602 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 16:58:11,609 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-12-23 16:58:11,615 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-23 16:58:11,616 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-23 16:58:11,616 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 16:58:11,616 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 16:58:11,667 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/elimination_max_rec_onepoint.c-witness.graphml [2020-12-23 16:58:11,667 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:58:11,668 INFO L168 Benchmark]: Toolchain (without parser) took 31297.71 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 125.4 MB in the beginning and 235.6 MB in the end (delta: -110.1 MB). Peak memory consumption was 1.8 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:11,669 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.3 MB in the end (delta: 214.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:58:11,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 114.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:11,670 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.63 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:11,670 INFO L168 Benchmark]: Boogie Preprocessor took 32.56 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 111.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:11,670 INFO L168 Benchmark]: RCFGBuilder took 768.24 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 89.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:11,671 INFO L168 Benchmark]: TraceAbstraction took 30056.38 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 88.9 MB in the beginning and 239.2 MB in the end (delta: -150.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:58:11,671 INFO L168 Benchmark]: Witness Printer took 69.29 ms. Allocated memory is still 262.1 MB. Free memory was 239.2 MB in the beginning and 235.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:11,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.3 MB in the end (delta: 214.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 114.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 55.63 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.56 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 111.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 768.24 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 89.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 30056.38 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 88.9 MB in the beginning and 239.2 MB in the end (delta: -150.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 69.29 ms. Allocated memory is still 262.1 MB. Free memory was 239.2 MB in the beginning and 235.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.9s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 13.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 801 SDtfs, 2388 SDslu, 3236 SDs, 0 SdLazy, 3767 SolverSat, 483 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 228 SyntacticMatches, 5 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 328 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 691 NumberOfCodeBlocks, 691 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 662 ConstructedInterpolants, 40 QuantifiedInterpolants, 155598 SizeOfPredicates, 91 NumberOfNonLiveVariables, 1659 ConjunctsInSsa, 236 ConjunctsInUnsatCore, 29 InterpolantComputations, 12 PerfectInterpolantSequences, 13/100 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 correct! Received shutdown request...