/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-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:17:41,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:17:41,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:17:41,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:17:41,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:17:41,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:17:41,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:17:41,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:17:41,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:17:41,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:17:41,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:17:41,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-23 06:17:41,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:17:41,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:17:41,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:17:41,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:17:41,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:17:41,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:17:41,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:17:41,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:17:41,821 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:17:41,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:17:41,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:17:41,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:17:41,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:17:41,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:17:41,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:17:41,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:17:41,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:17:41,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:17:41,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:17:41,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:17:41,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:17:41,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:17:41,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:17:41,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:17:41,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:17:41,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:17:41,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:17:41,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:17:41,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:17:41,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:17:42,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:17:42,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:17:42,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:17:42,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:17:42,284 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:17:42,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-12-23 06:17:42,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/858c8736e/b4c5c1bd47e84fffa80b4c7654ba0245/FLAG7f597e154 [2020-12-23 06:17:43,175 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:17:43,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-12-23 06:17:43,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/858c8736e/b4c5c1bd47e84fffa80b4c7654ba0245/FLAG7f597e154 [2020-12-23 06:17:43,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/858c8736e/b4c5c1bd47e84fffa80b4c7654ba0245 [2020-12-23 06:17:43,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:17:43,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:17:43,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:17:43,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:17:43,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:17:43,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:17:43" (1/1) ... [2020-12-23 06:17:43,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3900fd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:43, skipping insertion in model container [2020-12-23 06:17:43,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:17:43" (1/1) ... [2020-12-23 06:17:43,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:17:43,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:17:43,693 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] left hand side expression in assignment: lhs: VariableLHS[~elem~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~elem~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~dev1~0,] left hand side expression in assignment: lhs: VariableLHS[~dev2~0,] [2020-12-23 06:17:43,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:17:43,914 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:17:43,933 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] left hand side expression in assignment: lhs: VariableLHS[~elem~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~elem~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~dev1~0,] left hand side expression in assignment: lhs: VariableLHS[~dev2~0,] [2020-12-23 06:17:44,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:17:44,077 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:17:44,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44 WrapperNode [2020-12-23 06:17:44,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:17:44,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:17:44,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:17:44,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:17:44,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:17:44,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:17:44,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:17:44,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:17:44,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... [2020-12-23 06:17:44,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:17:44,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:17:44,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:17:44,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:17:44,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:17:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:17:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-23 06:17:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:17:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:17:44,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:17:45,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:17:45,004 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-23 06:17:45,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:17:45 BoogieIcfgContainer [2020-12-23 06:17:45,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:17:45,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:17:45,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:17:45,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:17:45,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:17:43" (1/3) ... [2020-12-23 06:17:45,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad9d9f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:17:45, skipping insertion in model container [2020-12-23 06:17:45,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:44" (2/3) ... [2020-12-23 06:17:45,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad9d9f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:17:45, skipping insertion in model container [2020-12-23 06:17:45,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:17:45" (3/3) ... [2020-12-23 06:17:45,016 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-12-23 06:17:45,024 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:17:45,031 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-23 06:17:45,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-23 06:17:45,090 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:17:45,090 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:17:45,091 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:17:45,091 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:17:45,091 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:17:45,091 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:17:45,091 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:17:45,092 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:17:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-12-23 06:17:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 06:17:45,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:45,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 06:17:45,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2020-12-23 06:17:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:45,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318113516] [2020-12-23 06:17:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:45,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318113516] [2020-12-23 06:17:45,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:45,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:17:45,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311576307] [2020-12-23 06:17:45,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:17:45,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:17:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:17:45,393 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-12-23 06:17:45,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:45,432 INFO L93 Difference]: Finished difference Result 85 states and 110 transitions. [2020-12-23 06:17:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:17:45,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 06:17:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:45,445 INFO L225 Difference]: With dead ends: 85 [2020-12-23 06:17:45,445 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:17:45,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:17:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:17:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:17:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:17:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-23 06:17:45,492 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 4 [2020-12-23 06:17:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:45,493 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-23 06:17:45,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:17:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-23 06:17:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:17:45,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:45,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:45,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:17:45,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash 170685048, now seen corresponding path program 1 times [2020-12-23 06:17:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:45,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895492875] [2020-12-23 06:17:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:45,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895492875] [2020-12-23 06:17:45,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:45,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:17:45,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600959574] [2020-12-23 06:17:45,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:17:45,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:45,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:17:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:17:45,684 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-12-23 06:17:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:45,783 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-12-23 06:17:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:17:45,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 06:17:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:45,786 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:17:45,786 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:17:45,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:17:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:17:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-12-23 06:17:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:17:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-12-23 06:17:45,795 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 15 [2020-12-23 06:17:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:45,796 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-12-23 06:17:45,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:17:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-12-23 06:17:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:17:45,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:45,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:45,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:17:45,798 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:45,799 INFO L82 PathProgramCache]: Analyzing trace with hash 227943350, now seen corresponding path program 1 times [2020-12-23 06:17:45,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:45,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371807289] [2020-12-23 06:17:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:45,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371807289] [2020-12-23 06:17:45,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:45,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:17:45,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930718385] [2020-12-23 06:17:45,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:17:45,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:45,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:17:45,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:17:45,895 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2020-12-23 06:17:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:45,945 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-12-23 06:17:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:17:45,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 06:17:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:45,947 INFO L225 Difference]: With dead ends: 67 [2020-12-23 06:17:45,948 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:17:45,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:17:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:17:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:17:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:17:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-23 06:17:45,955 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 15 [2020-12-23 06:17:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:45,956 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-23 06:17:45,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:17:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-23 06:17:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:17:45,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:45,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:45,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:17:45,958 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash 929007928, now seen corresponding path program 1 times [2020-12-23 06:17:45,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:45,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011276840] [2020-12-23 06:17:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011276840] [2020-12-23 06:17:46,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:46,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 06:17:46,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154193078] [2020-12-23 06:17:46,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:17:46,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:46,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:17:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:17:46,182 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-12-23 06:17:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:46,433 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-23 06:17:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:17:46,434 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 06:17:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:46,435 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:17:46,436 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:17:46,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:17:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:17:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-23 06:17:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:17:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-23 06:17:46,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2020-12-23 06:17:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:46,445 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-23 06:17:46,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:17:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-23 06:17:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:17:46,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:46,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:46,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:17:46,448 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash -93151004, now seen corresponding path program 1 times [2020-12-23 06:17:46,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:46,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741017377] [2020-12-23 06:17:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:46,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741017377] [2020-12-23 06:17:46,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:46,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-23 06:17:46,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907262241] [2020-12-23 06:17:46,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:17:46,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:46,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:17:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:17:46,622 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 12 states. [2020-12-23 06:17:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:46,944 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-12-23 06:17:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:17:46,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-12-23 06:17:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:46,946 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:17:46,946 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:17:46,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:17:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:17:46,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 06:17:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:17:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 06:17:46,954 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2020-12-23 06:17:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:46,954 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 06:17:46,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:17:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 06:17:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:17:46,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:46,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:46,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 06:17:46,956 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash -93091422, now seen corresponding path program 1 times [2020-12-23 06:17:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:46,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162635829] [2020-12-23 06:17:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:47,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162635829] [2020-12-23 06:17:47,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:47,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 06:17:47,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544129150] [2020-12-23 06:17:47,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:17:47,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:17:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:17:47,098 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-12-23 06:17:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:47,317 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-23 06:17:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:17:47,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-23 06:17:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:47,319 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:17:47,319 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:17:47,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:17:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:17:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 06:17:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:17:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-23 06:17:47,325 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2020-12-23 06:17:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:47,326 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-23 06:17:47,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:17:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-23 06:17:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:17:47,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:47,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:47,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 06:17:47,328 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1793070580, now seen corresponding path program 1 times [2020-12-23 06:17:47,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:47,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068129320] [2020-12-23 06:17:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:47,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068129320] [2020-12-23 06:17:47,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:47,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:17:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965783743] [2020-12-23 06:17:47,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:17:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:17:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:17:47,409 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 5 states. [2020-12-23 06:17:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:47,510 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-23 06:17:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:17:47,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-23 06:17:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:47,512 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:17:47,513 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:17:47,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:17:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:17:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-12-23 06:17:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:17:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-23 06:17:47,530 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2020-12-23 06:17:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:47,534 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-23 06:17:47,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:17:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-23 06:17:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:17:47,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:47,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:47,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 06:17:47,537 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1793130162, now seen corresponding path program 1 times [2020-12-23 06:17:47,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:47,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451171787] [2020-12-23 06:17:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451171787] [2020-12-23 06:17:47,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:47,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-23 06:17:47,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059712357] [2020-12-23 06:17:47,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:17:47,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:47,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:17:47,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:17:47,749 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2020-12-23 06:17:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:48,070 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-23 06:17:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:17:48,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-23 06:17:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:48,071 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:17:48,072 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:17:48,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:17:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:17:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-12-23 06:17:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:17:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-23 06:17:48,078 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2020-12-23 06:17:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:48,078 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-23 06:17:48,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:17:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-23 06:17:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:17:48,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:48,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:48,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 06:17:48,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1850388464, now seen corresponding path program 1 times [2020-12-23 06:17:48,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:48,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164220753] [2020-12-23 06:17:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:48,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164220753] [2020-12-23 06:17:48,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:48,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 06:17:48,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117219732] [2020-12-23 06:17:48,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:17:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:17:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:17:48,344 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-12-23 06:17:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:48,784 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-23 06:17:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:17:48,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-23 06:17:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:48,786 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:17:48,786 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:17:48,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:17:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:17:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:17:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:17:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 06:17:48,792 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2020-12-23 06:17:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:48,793 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 06:17:48,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:17:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 06:17:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:17:48,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:48,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:48,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 06:17:48,795 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:48,796 INFO L82 PathProgramCache]: Analyzing trace with hash 758876958, now seen corresponding path program 1 times [2020-12-23 06:17:48,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:48,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643363297] [2020-12-23 06:17:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:49,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643363297] [2020-12-23 06:17:49,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:49,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-23 06:17:49,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163135784] [2020-12-23 06:17:49,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:17:49,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:17:49,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:17:49,061 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-12-23 06:17:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:49,417 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 06:17:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:17:49,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-12-23 06:17:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:49,419 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:17:49,419 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:17:49,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:17:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:17:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-12-23 06:17:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:17:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 06:17:49,425 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-12-23 06:17:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:49,426 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 06:17:49,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:17:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 06:17:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:17:49,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:49,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:49,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 06:17:49,427 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash -50469668, now seen corresponding path program 1 times [2020-12-23 06:17:49,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:49,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968159044] [2020-12-23 06:17:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:17:49,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:17:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:17:49,484 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:17:49,519 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:17:49,519 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:17:49,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 06:17:49,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:17:49 BoogieIcfgContainer [2020-12-23 06:17:49,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:17:49,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:17:49,618 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:17:49,618 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:17:49,622 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:17:45" (3/4) ... [2020-12-23 06:17:49,626 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:17:49,754 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/rule60_list2.c_1.i-witness.graphml [2020-12-23 06:17:49,754 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:17:49,760 INFO L168 Benchmark]: Toolchain (without parser) took 6314.44 ms. Allocated memory was 164.6 MB in the beginning and 201.3 MB in the end (delta: 36.7 MB). Free memory was 138.4 MB in the beginning and 126.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 49.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:49,760 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 164.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:17:49,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 635.23 ms. Allocated memory is still 164.6 MB. Free memory was 138.2 MB in the beginning and 116.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:49,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.88 ms. Allocated memory is still 164.6 MB. Free memory was 115.8 MB in the beginning and 113.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:49,767 INFO L168 Benchmark]: Boogie Preprocessor took 32.14 ms. Allocated memory is still 164.6 MB. Free memory was 113.9 MB in the beginning and 112.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:49,768 INFO L168 Benchmark]: RCFGBuilder took 837.65 ms. Allocated memory is still 164.6 MB. Free memory was 112.4 MB in the beginning and 126.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 8.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:49,769 INFO L168 Benchmark]: TraceAbstraction took 4609.19 ms. Allocated memory was 164.6 MB in the beginning and 201.3 MB in the end (delta: 36.7 MB). Free memory was 125.4 MB in the beginning and 130.5 MB in the end (delta: -5.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:49,769 INFO L168 Benchmark]: Witness Printer took 136.16 ms. Allocated memory is still 201.3 MB. Free memory was 130.5 MB in the beginning and 126.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:49,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 164.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 635.23 ms. Allocated memory is still 164.6 MB. Free memory was 138.2 MB in the beginning and 116.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 55.88 ms. Allocated memory is still 164.6 MB. Free memory was 115.8 MB in the beginning and 113.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.14 ms. Allocated memory is still 164.6 MB. Free memory was 113.9 MB in the beginning and 112.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 837.65 ms. Allocated memory is still 164.6 MB. Free memory was 112.4 MB in the beginning and 126.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 8.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4609.19 ms. Allocated memory was 164.6 MB in the beginning and 201.3 MB in the end (delta: 36.7 MB). Free memory was 125.4 MB in the beginning and 130.5 MB in the end (delta: -5.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 8.0 GB. * Witness Printer took 136.16 ms. Allocated memory is still 201.3 MB. Free memory was 130.5 MB in the beginning and 126.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L546] struct list_head *dev1, *dev2; [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L529] return __getMemory(size); [L547] dev1 = my_malloc(sizeof(*dev1)) [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [elem={0:0}, guard_malloc_counter={0:2}, head={3:0}] [L529] return __getMemory(size); [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:2}, head={3:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [elem={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L541] COND FALSE !(entry==elem) VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L6] reach_error() VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.4s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 294 SDtfs, 972 SDslu, 653 SDs, 0 SdLazy, 847 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 220 NumberOfCodeBlocks, 220 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 18821 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...