/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/memsafety/960521-1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:05:07,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:05:07,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:05:08,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:05:08,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:05:08,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:05:08,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:05:08,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:05:08,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:05:08,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:05:08,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:05:08,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:05:08,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:05:08,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:05:08,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:05:08,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:05:08,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:05:08,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:05:08,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:05:08,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:05:08,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:05:08,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:05:08,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:05:08,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:05:08,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 19:05:08,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 19:05:08,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 19:05:08,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 19:05:08,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 19:05:08,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 19:05:08,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:05:08,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:05:08,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:05:08,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:05:08,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:05:08,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:05:08,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:05:08,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:05:08,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:05:08,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:05:08,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:05:08,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:05:08,132 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:05:08,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:05:08,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:05:08,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:05:08,135 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:05:08,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:05:08,135 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:05:08,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:05:08,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:05:08,136 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:05:08,136 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:05:08,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:05:08,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:05:08,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:05:08,137 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:05:08,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:05:08,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:05:08,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:05:08,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:05:08,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:05:08,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:05:08,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:05:08,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:05:08,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:05:08,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:05:08,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:05:08,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:05:08,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:05:08,612 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:05:08,613 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:05:08,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-2.i [2020-12-22 19:05:08,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c9f7edf/ad465bcf52e1456e8c82ab50f8311d47/FLAG05796e07c [2020-12-22 19:05:09,328 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:05:09,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-2.i [2020-12-22 19:05:09,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c9f7edf/ad465bcf52e1456e8c82ab50f8311d47/FLAG05796e07c [2020-12-22 19:05:09,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c9f7edf/ad465bcf52e1456e8c82ab50f8311d47 [2020-12-22 19:05:09,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:05:09,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:05:09,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:09,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:05:09,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:05:09,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:09" (1/1) ... [2020-12-22 19:05:09,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b97eeb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:09, skipping insertion in model container [2020-12-22 19:05:09,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:09" (1/1) ... [2020-12-22 19:05:09,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:05:09,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:05:10,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:10,198 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:05:10,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:10,340 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:05:10,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10 WrapperNode [2020-12-22 19:05:10,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:10,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:10,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:05:10,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:05:10,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:10,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:05:10,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:05:10,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:05:10,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... [2020-12-22 19:05:10,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:05:10,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:05:10,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:05:10,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:05:10,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:05:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:05:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:05:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:05:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:05:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:05:10,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:05:10,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:05:10,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:05:11,080 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:05:11,081 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 19:05:11,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:11 BoogieIcfgContainer [2020-12-22 19:05:11,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:05:11,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:05:11,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:05:11,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:05:11,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:09" (1/3) ... [2020-12-22 19:05:11,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619b6f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:11, skipping insertion in model container [2020-12-22 19:05:11,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:10" (2/3) ... [2020-12-22 19:05:11,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619b6f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:11, skipping insertion in model container [2020-12-22 19:05:11,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:11" (3/3) ... [2020-12-22 19:05:11,092 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-2.i [2020-12-22 19:05:11,099 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:05:11,104 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-22 19:05:11,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-22 19:05:11,146 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:05:11,146 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:05:11,146 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:05:11,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:05:11,147 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:05:11,147 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:05:11,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:05:11,147 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:05:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-22 19:05:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:05:11,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:05:11,173 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2020-12-22 19:05:11,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904237284] [2020-12-22 19:05:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904237284] [2020-12-22 19:05:11,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:11,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:11,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585779301] [2020-12-22 19:05:11,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:11,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:11,403 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-12-22 19:05:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,463 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 19:05:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:11,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:05:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,474 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:05:11,474 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:05:11,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:05:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 19:05:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:05:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-22 19:05:11,511 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2020-12-22 19:05:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,511 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-22 19:05:11,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-22 19:05:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:05:11,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:05:11,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:05:11,513 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,514 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2020-12-22 19:05:11,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042101478] [2020-12-22 19:05:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042101478] [2020-12-22 19:05:11,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:11,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:11,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792316071] [2020-12-22 19:05:11,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:11,580 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 3 states. [2020-12-22 19:05:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,604 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-22 19:05:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:11,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:05:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,606 INFO L225 Difference]: With dead ends: 46 [2020-12-22 19:05:11,606 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:05:11,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:05:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:05:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 19:05:11,613 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2020-12-22 19:05:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,614 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 19:05:11,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 19:05:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:05:11,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:05:11,616 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2020-12-22 19:05:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106468625] [2020-12-22 19:05:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106468625] [2020-12-22 19:05:11,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:11,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:11,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250945758] [2020-12-22 19:05:11,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:11,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:11,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:11,690 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-12-22 19:05:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,743 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-22 19:05:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:11,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 19:05:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,744 INFO L225 Difference]: With dead ends: 43 [2020-12-22 19:05:11,745 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 19:05:11,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 19:05:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 19:05:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:05:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-22 19:05:11,752 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2020-12-22 19:05:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,752 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-22 19:05:11,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-22 19:05:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:05:11,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:05:11,754 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,755 INFO L82 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2020-12-22 19:05:11,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151746906] [2020-12-22 19:05:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151746906] [2020-12-22 19:05:11,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:11,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:05:11,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145768590] [2020-12-22 19:05:11,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:11,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:11,909 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2020-12-22 19:05:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:12,082 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 19:05:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:12,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-22 19:05:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:12,087 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:05:12,087 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 19:05:12,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 19:05:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-12-22 19:05:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:05:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-22 19:05:12,100 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2020-12-22 19:05:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:12,100 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-22 19:05:12,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-22 19:05:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:05:12,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:12,104 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:12,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:05:12,104 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:12,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2020-12-22 19:05:12,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:12,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103801971] [2020-12-22 19:05:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:12,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103801971] [2020-12-22 19:05:12,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712190832] [2020-12-22 19:05:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:12,511 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:12,512 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:12,514 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:12,524 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:12,537 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:12,538 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-22 19:05:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:12,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:12,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-22 19:05:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798550566] [2020-12-22 19:05:12,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:05:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:05:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:05:12,639 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 9 states. [2020-12-22 19:05:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:12,864 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 19:05:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:12,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 19:05:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:12,865 INFO L225 Difference]: With dead ends: 57 [2020-12-22 19:05:12,865 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:05:12,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:05:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-12-22 19:05:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 19:05:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-22 19:05:12,872 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2020-12-22 19:05:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:12,873 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-22 19:05:12,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:05:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-22 19:05:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:05:12,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:12,874 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 19:05:13,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,088 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1472839145, now seen corresponding path program 2 times [2020-12-22 19:05:13,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:13,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024212469] [2020-12-22 19:05:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:13,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024212469] [2020-12-22 19:05:13,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306852733] [2020-12-22 19:05:13,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:13,314 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:13,314 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:13,316 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:13,322 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:13,325 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:13,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-22 19:05:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:13,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:13,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 19:05:13,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324699053] [2020-12-22 19:05:13,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:05:13,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:05:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:13,437 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2020-12-22 19:05:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:13,743 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-12-22 19:05:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:13,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-22 19:05:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:13,748 INFO L225 Difference]: With dead ends: 120 [2020-12-22 19:05:13,748 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 19:05:13,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 19:05:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 54. [2020-12-22 19:05:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:05:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-22 19:05:13,756 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2020-12-22 19:05:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:13,756 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-22 19:05:13,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:05:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-22 19:05:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:13,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:13,757 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:13,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,971 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:13,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2020-12-22 19:05:13,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:13,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403044676] [2020-12-22 19:05:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:05:14,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403044676] [2020-12-22 19:05:14,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:14,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:14,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559494539] [2020-12-22 19:05:14,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:14,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:14,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:14,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:14,038 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2020-12-22 19:05:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:14,099 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-22 19:05:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:14,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-22 19:05:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:14,101 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:14,101 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:05:14,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:05:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:05:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:05:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 19:05:14,117 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 20 [2020-12-22 19:05:14,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:14,117 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 19:05:14,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 19:05:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:14,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:14,119 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:14,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:05:14,119 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:14,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2020-12-22 19:05:14,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:14,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966327113] [2020-12-22 19:05:14,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:14,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966327113] [2020-12-22 19:05:14,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550576554] [2020-12-22 19:05:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:05:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:14,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:14,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-22 19:05:14,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215320564] [2020-12-22 19:05:14,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:05:14,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:05:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:14,494 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 13 states. [2020-12-22 19:05:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:14,615 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-22 19:05:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:14,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-12-22 19:05:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:14,618 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:05:14,619 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:05:14,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:05:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-22 19:05:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:05:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-22 19:05:14,639 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 20 [2020-12-22 19:05:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:14,639 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-22 19:05:14,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:05:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-22 19:05:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:05:14,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:14,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:14,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,854 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:14,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:14,855 INFO L82 PathProgramCache]: Analyzing trace with hash 116531578, now seen corresponding path program 2 times [2020-12-22 19:05:14,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:14,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852874828] [2020-12-22 19:05:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:15,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852874828] [2020-12-22 19:05:15,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106666276] [2020-12-22 19:05:15,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:15,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:15,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:15,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:15,128 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:15,128 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:15,130 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:15,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:15,148 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:15,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-22 19:05:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:05:15,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:15,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-12-22 19:05:15,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434944897] [2020-12-22 19:05:15,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:15,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:15,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:15,294 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 5 states. [2020-12-22 19:05:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:15,404 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-22 19:05:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:15,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-22 19:05:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:15,406 INFO L225 Difference]: With dead ends: 58 [2020-12-22 19:05:15,407 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 19:05:15,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 19:05:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 19:05:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 19:05:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-22 19:05:15,411 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 23 [2020-12-22 19:05:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:15,411 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-22 19:05:15,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-22 19:05:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:15,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:15,413 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:15,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:15,626 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1258641039, now seen corresponding path program 1 times [2020-12-22 19:05:15,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797748021] [2020-12-22 19:05:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:15,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797748021] [2020-12-22 19:05:15,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337163190] [2020-12-22 19:05:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:05:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:15,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:15,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 19:05:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091581943] [2020-12-22 19:05:15,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:05:15,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:05:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:15,988 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 15 states. [2020-12-22 19:05:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,125 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-22 19:05:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:05:16,126 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-22 19:05:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,127 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:05:16,127 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:05:16,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:05:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-22 19:05:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:05:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-12-22 19:05:16,131 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 26 [2020-12-22 19:05:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,131 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-12-22 19:05:16,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:05:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-12-22 19:05:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:05:16,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,132 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:16,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:05:16,346 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 2 times [2020-12-22 19:05:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471718268] [2020-12-22 19:05:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:16,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471718268] [2020-12-22 19:05:16,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552588489] [2020-12-22 19:05:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:16,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:16,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:16,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:05:16,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:16,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:16,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-22 19:05:16,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052177105] [2020-12-22 19:05:16,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:05:16,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:16,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:05:16,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:16,727 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 17 states. [2020-12-22 19:05:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,885 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-12-22 19:05:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:16,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-22 19:05:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,887 INFO L225 Difference]: With dead ends: 80 [2020-12-22 19:05:16,887 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 19:05:16,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 19:05:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-12-22 19:05:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 19:05:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-12-22 19:05:16,891 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 29 [2020-12-22 19:05:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,891 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-12-22 19:05:16,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:05:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-12-22 19:05:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 19:05:16,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,892 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:17,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:17,107 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:17,109 INFO L82 PathProgramCache]: Analyzing trace with hash 611161295, now seen corresponding path program 3 times [2020-12-22 19:05:17,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:17,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34427766] [2020-12-22 19:05:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:17,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34427766] [2020-12-22 19:05:17,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577521057] [2020-12-22 19:05:17,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:17,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:05:17,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:17,352 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:17,352 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:17,354 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:17,365 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:17,375 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:17,375 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-22 19:05:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:17,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:17,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-12-22 19:05:17,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948299660] [2020-12-22 19:05:17,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:05:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:05:17,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:17,635 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2020-12-22 19:05:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:17,767 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-12-22 19:05:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:17,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-22 19:05:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:17,768 INFO L225 Difference]: With dead ends: 69 [2020-12-22 19:05:17,768 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 19:05:17,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 19:05:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-22 19:05:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 19:05:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-22 19:05:17,773 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 32 [2020-12-22 19:05:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:17,773 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-22 19:05:17,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:05:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-22 19:05:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 19:05:17,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:17,775 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:17,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:17,990 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1172416315, now seen corresponding path program 1 times [2020-12-22 19:05:17,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:17,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363007298] [2020-12-22 19:05:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363007298] [2020-12-22 19:05:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585257056] [2020-12-22 19:05:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:05:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:18,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:18,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-22 19:05:18,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363563818] [2020-12-22 19:05:18,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:05:18,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:05:18,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:18,394 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 19 states. [2020-12-22 19:05:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,545 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-12-22 19:05:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:05:18,545 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-12-22 19:05:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,546 INFO L225 Difference]: With dead ends: 79 [2020-12-22 19:05:18,546 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 19:05:18,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:05:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 19:05:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-12-22 19:05:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:05:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-22 19:05:18,550 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 53 [2020-12-22 19:05:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,550 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-22 19:05:18,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:05:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-22 19:05:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 19:05:18,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,552 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:18,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 19:05:18,766 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1736039872, now seen corresponding path program 2 times [2020-12-22 19:05:18,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025281753] [2020-12-22 19:05:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:18,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025281753] [2020-12-22 19:05:18,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5937536] [2020-12-22 19:05:18,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:19,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:19,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 19:05:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-22 19:05:19,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:19,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 13 [2020-12-22 19:05:19,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387020636] [2020-12-22 19:05:19,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:19,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:19,085 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 3 states. [2020-12-22 19:05:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:19,101 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-22 19:05:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:19,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 19:05:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:19,102 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:05:19,102 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:05:19,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:05:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-22 19:05:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 19:05:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-12-22 19:05:19,105 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 59 [2020-12-22 19:05:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:19,105 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-12-22 19:05:19,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-12-22 19:05:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:05:19,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:19,107 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:19,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:19,322 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1900363372, now seen corresponding path program 1 times [2020-12-22 19:05:19,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:19,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906454481] [2020-12-22 19:05:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:19,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906454481] [2020-12-22 19:05:19,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782612489] [2020-12-22 19:05:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:05:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:19,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:19,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-22 19:05:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314897927] [2020-12-22 19:05:19,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:05:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:19,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:05:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:05:19,780 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 21 states. [2020-12-22 19:05:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:19,961 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-12-22 19:05:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:05:19,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-12-22 19:05:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:19,965 INFO L225 Difference]: With dead ends: 83 [2020-12-22 19:05:19,965 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 19:05:19,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:05:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 19:05:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-12-22 19:05:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 19:05:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-22 19:05:19,974 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 61 [2020-12-22 19:05:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:19,974 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-22 19:05:19,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:05:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-22 19:05:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 19:05:19,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:19,977 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:20,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:05:20,192 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1188726905, now seen corresponding path program 2 times [2020-12-22 19:05:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:20,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623193094] [2020-12-22 19:05:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:20,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623193094] [2020-12-22 19:05:20,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489416015] [2020-12-22 19:05:20,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:20,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:20,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:05:20,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:20,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:20,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-22 19:05:20,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150713378] [2020-12-22 19:05:20,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:05:20,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:20,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:05:20,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:05:20,658 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 23 states. [2020-12-22 19:05:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:20,818 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-12-22 19:05:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:05:20,819 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-12-22 19:05:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:20,820 INFO L225 Difference]: With dead ends: 89 [2020-12-22 19:05:20,820 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 19:05:20,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:05:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 19:05:20,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-12-22 19:05:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 19:05:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-12-22 19:05:20,823 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 67 [2020-12-22 19:05:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:20,823 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-12-22 19:05:20,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:05:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-12-22 19:05:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 19:05:20,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:20,825 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:21,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:05:21,054 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 822105844, now seen corresponding path program 3 times [2020-12-22 19:05:21,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:21,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779844238] [2020-12-22 19:05:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:21,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779844238] [2020-12-22 19:05:21,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313137459] [2020-12-22 19:05:21,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:21,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-22 19:05:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 19:05:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:21,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:21,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2020-12-22 19:05:21,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763683750] [2020-12-22 19:05:21,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:05:21,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:21,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:05:21,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:05:21,779 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 25 states. [2020-12-22 19:05:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:21,991 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2020-12-22 19:05:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:05:21,991 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-12-22 19:05:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:21,992 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:05:21,992 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:05:21,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=392, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:05:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-12-22 19:05:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 19:05:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-12-22 19:05:21,997 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 73 [2020-12-22 19:05:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:21,997 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-12-22 19:05:21,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:05:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-12-22 19:05:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 19:05:21,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:21,998 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:22,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 19:05:22,212 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1856483815, now seen corresponding path program 4 times [2020-12-22 19:05:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:22,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757980713] [2020-12-22 19:05:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:05:22,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757980713] [2020-12-22 19:05:22,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13864782] [2020-12-22 19:05:22,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:23,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:23,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:23,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:05:23,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:23,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2020-12-22 19:05:23,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625186524] [2020-12-22 19:05:23,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:05:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:05:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:05:23,552 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 27 states. [2020-12-22 19:05:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:23,781 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2020-12-22 19:05:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:05:23,782 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-12-22 19:05:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:23,783 INFO L225 Difference]: With dead ends: 101 [2020-12-22 19:05:23,783 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 19:05:23,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=457, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 19:05:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-12-22 19:05:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 19:05:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-12-22 19:05:23,787 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 79 [2020-12-22 19:05:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:23,787 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-12-22 19:05:23,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:05:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-12-22 19:05:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 19:05:23,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:23,788 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:24,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:05:24,003 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1370997844, now seen corresponding path program 5 times [2020-12-22 19:05:24,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:24,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707810303] [2020-12-22 19:05:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:24,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707810303] [2020-12-22 19:05:24,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143042654] [2020-12-22 19:05:24,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:27,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 19:05:27,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:27,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:27,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:27,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 19:05:27,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295780764] [2020-12-22 19:05:27,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:05:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:27,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:05:27,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:27,904 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 16 states. [2020-12-22 19:05:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:28,080 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-12-22 19:05:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:05:28,080 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-12-22 19:05:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:28,081 INFO L225 Difference]: With dead ends: 108 [2020-12-22 19:05:28,081 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 19:05:28,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 19:05:28,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2020-12-22 19:05:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 19:05:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-12-22 19:05:28,084 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 85 [2020-12-22 19:05:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:28,085 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-12-22 19:05:28,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:05:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-12-22 19:05:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 19:05:28,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:28,086 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:28,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:28,298 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:28,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1875567827, now seen corresponding path program 6 times [2020-12-22 19:05:28,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:28,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898097234] [2020-12-22 19:05:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:28,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898097234] [2020-12-22 19:05:28,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790405292] [2020-12-22 19:05:28,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:29,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 19:05:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:05:29,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:29,846 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:29,847 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:29,848 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:29,854 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:29,855 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:29,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-22 19:05:29,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 14 [2020-12-22 19:05:29,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:29,933 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:29,934 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:29,934 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2020-12-22 19:05:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-22 19:05:30,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:30,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2020-12-22 19:05:30,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541508592] [2020-12-22 19:05:30,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 19:05:30,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:30,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 19:05:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=756, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:30,474 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 34 states. [2020-12-22 19:05:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:31,616 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-12-22 19:05:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 19:05:31,616 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 88 [2020-12-22 19:05:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:31,617 INFO L225 Difference]: With dead ends: 134 [2020-12-22 19:05:31,617 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 19:05:31,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=811, Invalid=1739, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 19:05:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 19:05:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2020-12-22 19:05:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 19:05:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-12-22 19:05:31,623 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 88 [2020-12-22 19:05:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:31,623 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-12-22 19:05:31,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 19:05:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-12-22 19:05:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 19:05:31,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:31,624 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:31,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:31,838 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash -435222092, now seen corresponding path program 7 times [2020-12-22 19:05:31,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:31,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734054734] [2020-12-22 19:05:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:05:32,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734054734] [2020-12-22 19:05:32,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62340734] [2020-12-22 19:05:32,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:05:32,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:05:32,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:32,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2020-12-22 19:05:32,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64820708] [2020-12-22 19:05:32,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:05:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:05:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=649, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:05:32,675 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 33 states. [2020-12-22 19:05:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:32,947 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2020-12-22 19:05:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:05:32,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-12-22 19:05:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:32,948 INFO L225 Difference]: With dead ends: 119 [2020-12-22 19:05:32,949 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 19:05:32,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 19:05:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-12-22 19:05:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 19:05:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-12-22 19:05:32,952 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 97 [2020-12-22 19:05:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:32,952 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-12-22 19:05:32,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:05:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-12-22 19:05:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 19:05:32,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:32,954 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:33,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:33,168 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash -94121639, now seen corresponding path program 8 times [2020-12-22 19:05:33,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:33,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630174046] [2020-12-22 19:05:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 19:05:33,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630174046] [2020-12-22 19:05:33,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339763454] [2020-12-22 19:05:33,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:33,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 19:05:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 19:05:33,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:33,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-22 19:05:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037540527] [2020-12-22 19:05:33,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:05:33,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:05:33,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=732, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:05:33,999 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 35 states. [2020-12-22 19:05:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:34,312 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2020-12-22 19:05:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:05:34,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-12-22 19:05:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:34,314 INFO L225 Difference]: With dead ends: 125 [2020-12-22 19:05:34,314 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 19:05:34,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=493, Invalid=767, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:05:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 19:05:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-12-22 19:05:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 19:05:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-12-22 19:05:34,317 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 103 [2020-12-22 19:05:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:34,318 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-12-22 19:05:34,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:05:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-12-22 19:05:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 19:05:34,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:34,319 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:34,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:05:34,533 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1622419220, now seen corresponding path program 9 times [2020-12-22 19:05:34,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:34,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319912029] [2020-12-22 19:05:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-22 19:05:34,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319912029] [2020-12-22 19:05:34,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859513177] [2020-12-22 19:05:34,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:36,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-22 19:05:36,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:36,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:05:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-22 19:05:37,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:37,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2020-12-22 19:05:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089067390] [2020-12-22 19:05:37,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:05:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:05:37,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:05:37,290 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 37 states. [2020-12-22 19:05:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:37,662 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2020-12-22 19:05:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 19:05:37,662 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-12-22 19:05:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:37,663 INFO L225 Difference]: With dead ends: 131 [2020-12-22 19:05:37,664 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 19:05:37,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=857, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 19:05:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-12-22 19:05:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 19:05:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-12-22 19:05:37,668 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 109 [2020-12-22 19:05:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:37,668 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-12-22 19:05:37,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:05:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-12-22 19:05:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 19:05:37,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:37,669 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:37,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:05:37,884 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 722833145, now seen corresponding path program 10 times [2020-12-22 19:05:37,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:37,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051800779] [2020-12-22 19:05:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 19:05:38,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051800779] [2020-12-22 19:05:38,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787472558] [2020-12-22 19:05:38,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:48,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:48,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:48,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 19:05:49,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:49,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2020-12-22 19:05:49,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075127381] [2020-12-22 19:05:49,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:05:49,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:49,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:05:49,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=913, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:05:49,433 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 39 states. [2020-12-22 19:05:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:49,797 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2020-12-22 19:05:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:05:49,798 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-12-22 19:05:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:49,799 INFO L225 Difference]: With dead ends: 137 [2020-12-22 19:05:49,799 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 19:05:49,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=608, Invalid=952, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:05:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 19:05:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2020-12-22 19:05:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 19:05:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-12-22 19:05:49,803 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 115 [2020-12-22 19:05:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:49,804 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-12-22 19:05:49,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:05:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-12-22 19:05:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 19:05:49,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:49,805 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:50,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:05:50,019 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1848304524, now seen corresponding path program 11 times [2020-12-22 19:05:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:50,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160293127] [2020-12-22 19:05:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:05:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160293127] [2020-12-22 19:05:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967266760] [2020-12-22 19:05:50,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:50,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 19:06:50,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:06:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:06:50,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:50,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 19:06:50,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158195748] [2020-12-22 19:06:50,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:06:50,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:06:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:06:50,499 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 22 states. [2020-12-22 19:06:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:50,780 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-12-22 19:06:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:06:50,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-12-22 19:06:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:50,783 INFO L225 Difference]: With dead ends: 144 [2020-12-22 19:06:50,783 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 19:06:50,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:06:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 19:06:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2020-12-22 19:06:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 19:06:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-12-22 19:06:50,787 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 121 [2020-12-22 19:06:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:50,787 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-12-22 19:06:50,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:06:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-12-22 19:06:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 19:06:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:50,788 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:51,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:06:51,004 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:06:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2036524877, now seen corresponding path program 12 times [2020-12-22 19:06:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:51,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103190364] [2020-12-22 19:06:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:06:51,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103190364] [2020-12-22 19:06:51,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746274497] [2020-12-22 19:06:51,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:01,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 19:07:01,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:07:01,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:07:01,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:01,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 19:07:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761482386] [2020-12-22 19:07:01,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:07:01,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:07:01,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:07:01,552 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 23 states. [2020-12-22 19:07:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:01,800 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2020-12-22 19:07:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 19:07:01,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2020-12-22 19:07:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:01,802 INFO L225 Difference]: With dead ends: 151 [2020-12-22 19:07:01,802 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 19:07:01,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:07:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 19:07:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2020-12-22 19:07:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 19:07:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2020-12-22 19:07:01,807 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 124 [2020-12-22 19:07:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:01,807 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2020-12-22 19:07:01,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:07:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2020-12-22 19:07:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 19:07:01,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:01,808 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:02,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:07:02,021 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:07:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash -81772524, now seen corresponding path program 13 times [2020-12-22 19:07:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:02,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415184371] [2020-12-22 19:07:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:07:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415184371] [2020-12-22 19:07:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353754443] [2020-12-22 19:07:02,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:07:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 19:07:03,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:03,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2020-12-22 19:07:03,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164982416] [2020-12-22 19:07:03,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 19:07:03,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:03,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 19:07:03,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:07:03,052 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 43 states. [2020-12-22 19:07:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:03,550 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2020-12-22 19:07:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:07:03,551 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-12-22 19:07:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:03,551 INFO L225 Difference]: With dead ends: 155 [2020-12-22 19:07:03,552 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 19:07:03,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=803, Invalid=1267, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:07:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 19:07:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-12-22 19:07:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 19:07:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-12-22 19:07:03,556 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 127 [2020-12-22 19:07:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:03,556 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-12-22 19:07:03,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 19:07:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-12-22 19:07:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 19:07:03,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:03,557 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:03,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:03,772 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:07:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash 216728121, now seen corresponding path program 14 times [2020-12-22 19:07:03,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:03,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390912244] [2020-12-22 19:07:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-22 19:07:04,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390912244] [2020-12-22 19:07:04,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880092700] [2020-12-22 19:07:04,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:04,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:07:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:04,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:07:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-22 19:07:04,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:04,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2020-12-22 19:07:04,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784006832] [2020-12-22 19:07:04,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 19:07:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 19:07:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:07:04,876 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 47 states. [2020-12-22 19:07:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:05,270 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2020-12-22 19:07:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:07:05,270 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-12-22 19:07:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:05,272 INFO L225 Difference]: With dead ends: 161 [2020-12-22 19:07:05,272 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 19:07:05,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=874, Invalid=1382, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:07:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 19:07:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-12-22 19:07:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 19:07:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-12-22 19:07:05,277 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 139 [2020-12-22 19:07:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:05,277 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-12-22 19:07:05,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 19:07:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-12-22 19:07:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 19:07:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:05,279 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:05,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:07:05,494 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:07:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:05,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1807912756, now seen corresponding path program 15 times [2020-12-22 19:07:05,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:05,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100069961] [2020-12-22 19:07:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 19:07:05,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100069961] [2020-12-22 19:07:05,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188519465] [2020-12-22 19:07:05,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:28,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-22 19:07:28,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:07:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 19:07:29,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:29,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2020-12-22 19:07:29,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023570113] [2020-12-22 19:07:29,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 19:07:29,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 19:07:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=1453, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:07:29,082 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 49 states. [2020-12-22 19:07:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:29,551 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2020-12-22 19:07:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 19:07:29,554 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-12-22 19:07:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:29,555 INFO L225 Difference]: With dead ends: 167 [2020-12-22 19:07:29,555 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 19:07:29,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=948, Invalid=1502, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:07:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 19:07:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-12-22 19:07:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 19:07:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-12-22 19:07:29,560 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 145 [2020-12-22 19:07:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:29,560 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-12-22 19:07:29,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 19:07:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-12-22 19:07:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 19:07:29,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:29,561 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:29,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:07:29,762 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:07:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:29,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1624066087, now seen corresponding path program 16 times [2020-12-22 19:07:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:29,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251960748] [2020-12-22 19:07:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-22 19:07:30,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251960748] [2020-12-22 19:07:30,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29490370] [2020-12-22 19:07:30,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:45,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:08:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:08:45,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:08:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-22 19:08:46,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2020-12-22 19:08:46,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147259589] [2020-12-22 19:08:46,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 19:08:46,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 19:08:46,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1576, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 19:08:46,311 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 51 states. [2020-12-22 19:08:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:46,785 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2020-12-22 19:08:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:08:46,785 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-12-22 19:08:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:46,786 INFO L225 Difference]: With dead ends: 173 [2020-12-22 19:08:46,786 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 19:08:46,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1025, Invalid=1627, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:08:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 19:08:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2020-12-22 19:08:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 19:08:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-12-22 19:08:46,791 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 151 [2020-12-22 19:08:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:46,791 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-12-22 19:08:46,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 19:08:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-12-22 19:08:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 19:08:46,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:46,792 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:08:46,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:46,993 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:08:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1751846036, now seen corresponding path program 17 times [2020-12-22 19:08:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:46,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301040700] [2020-12-22 19:08:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-22 19:08:47,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301040700] [2020-12-22 19:08:47,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267450463] [2020-12-22 19:08:47,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true