/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:26:48,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:26:48,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:26:48,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:26:48,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:26:48,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:26:48,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:26:48,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:26:48,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:26:48,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:26:48,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:26:48,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:26:48,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:26:48,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:26:48,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:26:48,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:26:48,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:26:48,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:26:48,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:26:48,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:26:48,178 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:26:48,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:26:48,179 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:26:48,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:26:48,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:26:48,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:26:48,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:26:48,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:26:48,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:26:48,180 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:26:48,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:26:48,181 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:26:48,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:26:48,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:26:48,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:26:48,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:26:48,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:26:48,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:26:48,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:26:48,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:26:48,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:26:48,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:26:48,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:26:48,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:26:48,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:26:48,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:26:48,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:26:48,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:26:48,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:26:48,618 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:26:48,619 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:26:48,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-11-06 22:26:48,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab64e26e/ac7f4194a9104946802dc8033abbc203/FLAGe8912d27a [2020-11-06 22:26:49,349 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:26:49,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2020-11-06 22:26:49,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab64e26e/ac7f4194a9104946802dc8033abbc203/FLAGe8912d27a [2020-11-06 22:26:49,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab64e26e/ac7f4194a9104946802dc8033abbc203 [2020-11-06 22:26:49,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:26:49,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:26:49,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:26:49,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:26:49,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:26:49,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:49" (1/1) ... [2020-11-06 22:26:49,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be471ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:49, skipping insertion in model container [2020-11-06 22:26:49,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:49" (1/1) ... [2020-11-06 22:26:49,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:26:49,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:26:50,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:26:50,060 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:26:50,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:26:50,106 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:26:50,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50 WrapperNode [2020-11-06 22:26:50,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:26:50,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:26:50,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:26:50,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:26:50,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (1/1) ... [2020-11-06 22:26:50,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (1/1) ... [2020-11-06 22:26:50,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (1/1) ... [2020-11-06 22:26:50,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (1/1) ... [2020-11-06 22:26:50,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (1/1) ... [2020-11-06 22:26:50,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (1/1) ... [2020-11-06 22:26:50,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (1/1) ... [2020-11-06 22:26:50,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:26:50,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:26:50,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:26:50,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:26:50,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (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 [2020-11-06 22:26:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:26:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:26:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:26:50,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:26:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:26:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:26:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:26:50,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:26:50,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:26:50,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:26:50,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:26:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:26:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:26:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:26:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:26:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:26:50,911 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:26:50,912 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:26:50,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:50 BoogieIcfgContainer [2020-11-06 22:26:50,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:26:50,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:26:50,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:26:50,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:26:50,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:49" (1/3) ... [2020-11-06 22:26:50,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123df68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:50, skipping insertion in model container [2020-11-06 22:26:50,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:50" (2/3) ... [2020-11-06 22:26:50,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123df68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:50, skipping insertion in model container [2020-11-06 22:26:50,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:50" (3/3) ... [2020-11-06 22:26:50,925 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-11-06 22:26:50,942 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:26:50,947 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:26:50,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:26:50,991 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:26:50,992 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:26:50,992 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:26:50,992 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:26:50,992 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:26:50,992 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:26:50,992 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:26:50,993 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:26:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-11-06 22:26:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:26:51,020 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:51,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:51,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:51,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2118099465, now seen corresponding path program 1 times [2020-11-06 22:26:51,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:51,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136624361] [2020-11-06 22:26:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:51,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:51,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136624361] [2020-11-06 22:26:51,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:51,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:51,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109428600] [2020-11-06 22:26:51,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:51,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:51,403 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-11-06 22:26:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:51,774 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2020-11-06 22:26:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:51,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-06 22:26:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:51,792 INFO L225 Difference]: With dead ends: 68 [2020-11-06 22:26:51,792 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:26:51,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:26:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-11-06 22:26:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:26:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-11-06 22:26:51,856 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-11-06 22:26:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:51,857 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-11-06 22:26:51,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-11-06 22:26:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:26:51,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:51,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:51,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:26:51,859 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1783840821, now seen corresponding path program 1 times [2020-11-06 22:26:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:51,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900230965] [2020-11-06 22:26:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:52,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:52,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900230965] [2020-11-06 22:26:52,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:52,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:52,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91036913] [2020-11-06 22:26:52,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:52,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:52,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:52,124 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-11-06 22:26:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:52,400 INFO L93 Difference]: Finished difference Result 79 states and 135 transitions. [2020-11-06 22:26:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:52,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-06 22:26:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:52,403 INFO L225 Difference]: With dead ends: 79 [2020-11-06 22:26:52,403 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:26:52,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:26:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-11-06 22:26:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-06 22:26:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-11-06 22:26:52,419 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-11-06 22:26:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:52,420 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-11-06 22:26:52,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-11-06 22:26:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:26:52,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:52,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:52,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:26:52,422 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1229925405, now seen corresponding path program 1 times [2020-11-06 22:26:52,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:52,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136146355] [2020-11-06 22:26:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:52,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136146355] [2020-11-06 22:26:52,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:52,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:52,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774061240] [2020-11-06 22:26:52,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:52,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:52,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:52,605 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-11-06 22:26:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:52,915 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2020-11-06 22:26:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:52,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-06 22:26:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:52,918 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:26:52,918 INFO L226 Difference]: Without dead ends: 52 [2020-11-06 22:26:52,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-06 22:26:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-11-06 22:26:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-06 22:26:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 81 transitions. [2020-11-06 22:26:52,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 81 transitions. Word has length 19 [2020-11-06 22:26:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:52,948 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 81 transitions. [2020-11-06 22:26:52,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 81 transitions. [2020-11-06 22:26:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:26:52,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:52,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:52,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:26:52,952 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash -528860827, now seen corresponding path program 1 times [2020-11-06 22:26:52,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:52,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741249874] [2020-11-06 22:26:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:53,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741249874] [2020-11-06 22:26:53,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:53,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:53,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510865495] [2020-11-06 22:26:53,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:53,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:53,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:53,097 INFO L87 Difference]: Start difference. First operand 51 states and 81 transitions. Second operand 4 states. [2020-11-06 22:26:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:53,277 INFO L93 Difference]: Finished difference Result 131 states and 218 transitions. [2020-11-06 22:26:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:53,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-06 22:26:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:53,279 INFO L225 Difference]: With dead ends: 131 [2020-11-06 22:26:53,279 INFO L226 Difference]: Without dead ends: 89 [2020-11-06 22:26:53,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-06 22:26:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-06 22:26:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-06 22:26:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 142 transitions. [2020-11-06 22:26:53,295 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 142 transitions. Word has length 19 [2020-11-06 22:26:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:53,296 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 142 transitions. [2020-11-06 22:26:53,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 142 transitions. [2020-11-06 22:26:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:26:53,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:53,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:53,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:26:53,298 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:53,299 INFO L82 PathProgramCache]: Analyzing trace with hash -135833817, now seen corresponding path program 1 times [2020-11-06 22:26:53,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:53,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180347429] [2020-11-06 22:26:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:53,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180347429] [2020-11-06 22:26:53,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:53,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:53,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545924875] [2020-11-06 22:26:53,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:53,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:53,379 INFO L87 Difference]: Start difference. First operand 88 states and 142 transitions. Second operand 4 states. [2020-11-06 22:26:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:53,547 INFO L93 Difference]: Finished difference Result 112 states and 181 transitions. [2020-11-06 22:26:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:53,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-06 22:26:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:53,549 INFO L225 Difference]: With dead ends: 112 [2020-11-06 22:26:53,549 INFO L226 Difference]: Without dead ends: 109 [2020-11-06 22:26:53,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-06 22:26:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2020-11-06 22:26:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-06 22:26:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2020-11-06 22:26:53,564 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 19 [2020-11-06 22:26:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:53,564 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2020-11-06 22:26:53,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2020-11-06 22:26:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:26:53,566 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:53,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:53,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:26:53,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash 791842688, now seen corresponding path program 1 times [2020-11-06 22:26:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:53,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064390303] [2020-11-06 22:26:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:53,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064390303] [2020-11-06 22:26:53,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:53,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:53,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451290384] [2020-11-06 22:26:53,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:53,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:53,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:53,648 INFO L87 Difference]: Start difference. First operand 88 states and 140 transitions. Second operand 4 states. [2020-11-06 22:26:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:53,799 INFO L93 Difference]: Finished difference Result 156 states and 253 transitions. [2020-11-06 22:26:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:53,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-06 22:26:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:53,802 INFO L225 Difference]: With dead ends: 156 [2020-11-06 22:26:53,802 INFO L226 Difference]: Without dead ends: 153 [2020-11-06 22:26:53,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-06 22:26:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-11-06 22:26:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-06 22:26:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 190 transitions. [2020-11-06 22:26:53,818 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 190 transitions. Word has length 20 [2020-11-06 22:26:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:53,819 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 190 transitions. [2020-11-06 22:26:53,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 190 transitions. [2020-11-06 22:26:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:26:53,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:53,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:53,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:26:53,835 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:53,836 INFO L82 PathProgramCache]: Analyzing trace with hash 398815678, now seen corresponding path program 1 times [2020-11-06 22:26:53,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:53,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358327061] [2020-11-06 22:26:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:53,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358327061] [2020-11-06 22:26:53,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:53,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:53,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958063072] [2020-11-06 22:26:53,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:53,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:53,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:53,913 INFO L87 Difference]: Start difference. First operand 120 states and 190 transitions. Second operand 4 states. [2020-11-06 22:26:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:54,070 INFO L93 Difference]: Finished difference Result 272 states and 437 transitions. [2020-11-06 22:26:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:54,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-06 22:26:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:54,075 INFO L225 Difference]: With dead ends: 272 [2020-11-06 22:26:54,075 INFO L226 Difference]: Without dead ends: 161 [2020-11-06 22:26:54,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-06 22:26:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-11-06 22:26:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-06 22:26:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2020-11-06 22:26:54,119 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 20 [2020-11-06 22:26:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:54,119 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2020-11-06 22:26:54,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2020-11-06 22:26:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:54,126 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:54,127 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] [2020-11-06 22:26:54,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:26:54,127 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:54,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1216010736, now seen corresponding path program 1 times [2020-11-06 22:26:54,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:54,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351794003] [2020-11-06 22:26:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:54,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351794003] [2020-11-06 22:26:54,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:54,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:54,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641961087] [2020-11-06 22:26:54,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:54,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:54,198 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand 4 states. [2020-11-06 22:26:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:54,322 INFO L93 Difference]: Finished difference Result 242 states and 375 transitions. [2020-11-06 22:26:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:54,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:54,325 INFO L225 Difference]: With dead ends: 242 [2020-11-06 22:26:54,325 INFO L226 Difference]: Without dead ends: 167 [2020-11-06 22:26:54,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-06 22:26:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-11-06 22:26:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-11-06 22:26:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 252 transitions. [2020-11-06 22:26:54,340 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 252 transitions. Word has length 21 [2020-11-06 22:26:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:54,341 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 252 transitions. [2020-11-06 22:26:54,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 252 transitions. [2020-11-06 22:26:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:54,343 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:54,343 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] [2020-11-06 22:26:54,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 22:26:54,344 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash -514946158, now seen corresponding path program 1 times [2020-11-06 22:26:54,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:54,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747327707] [2020-11-06 22:26:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:54,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747327707] [2020-11-06 22:26:54,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:54,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195383097] [2020-11-06 22:26:54,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:54,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:54,433 INFO L87 Difference]: Start difference. First operand 166 states and 252 transitions. Second operand 4 states. [2020-11-06 22:26:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:54,564 INFO L93 Difference]: Finished difference Result 286 states and 439 transitions. [2020-11-06 22:26:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:54,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:54,567 INFO L225 Difference]: With dead ends: 286 [2020-11-06 22:26:54,567 INFO L226 Difference]: Without dead ends: 283 [2020-11-06 22:26:54,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-11-06 22:26:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 234. [2020-11-06 22:26:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-06 22:26:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 348 transitions. [2020-11-06 22:26:54,585 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 348 transitions. Word has length 21 [2020-11-06 22:26:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:54,585 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 348 transitions. [2020-11-06 22:26:54,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 348 transitions. [2020-11-06 22:26:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:54,587 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:54,587 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] [2020-11-06 22:26:54,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 22:26:54,588 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash -907973168, now seen corresponding path program 1 times [2020-11-06 22:26:54,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:54,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488652007] [2020-11-06 22:26:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:54,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488652007] [2020-11-06 22:26:54,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:54,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:54,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462587160] [2020-11-06 22:26:54,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:54,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:54,648 INFO L87 Difference]: Start difference. First operand 234 states and 348 transitions. Second operand 4 states. [2020-11-06 22:26:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:54,821 INFO L93 Difference]: Finished difference Result 526 states and 783 transitions. [2020-11-06 22:26:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:54,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:54,825 INFO L225 Difference]: With dead ends: 526 [2020-11-06 22:26:54,826 INFO L226 Difference]: Without dead ends: 307 [2020-11-06 22:26:54,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-11-06 22:26:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-11-06 22:26:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-11-06 22:26:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 440 transitions. [2020-11-06 22:26:54,852 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 440 transitions. Word has length 21 [2020-11-06 22:26:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:54,852 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 440 transitions. [2020-11-06 22:26:54,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 440 transitions. [2020-11-06 22:26:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:54,861 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:54,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:54,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:26:54,862 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1223218569, now seen corresponding path program 1 times [2020-11-06 22:26:54,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:54,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093807045] [2020-11-06 22:26:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:54,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093807045] [2020-11-06 22:26:54,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:54,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:54,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756500862] [2020-11-06 22:26:54,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:54,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:54,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:54,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:54,965 INFO L87 Difference]: Start difference. First operand 306 states and 440 transitions. Second operand 4 states. [2020-11-06 22:26:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:55,117 INFO L93 Difference]: Finished difference Result 458 states and 655 transitions. [2020-11-06 22:26:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:55,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:55,121 INFO L225 Difference]: With dead ends: 458 [2020-11-06 22:26:55,121 INFO L226 Difference]: Without dead ends: 315 [2020-11-06 22:26:55,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-11-06 22:26:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2020-11-06 22:26:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-11-06 22:26:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 440 transitions. [2020-11-06 22:26:55,144 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 440 transitions. Word has length 22 [2020-11-06 22:26:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:55,144 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 440 transitions. [2020-11-06 22:26:55,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 440 transitions. [2020-11-06 22:26:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:55,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:55,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:55,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 22:26:55,147 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:55,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1924283147, now seen corresponding path program 1 times [2020-11-06 22:26:55,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:55,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089949170] [2020-11-06 22:26:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:55,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089949170] [2020-11-06 22:26:55,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:55,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:55,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407159943] [2020-11-06 22:26:55,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:55,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:55,261 INFO L87 Difference]: Start difference. First operand 314 states and 440 transitions. Second operand 4 states. [2020-11-06 22:26:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:55,417 INFO L93 Difference]: Finished difference Result 526 states and 739 transitions. [2020-11-06 22:26:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:55,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:55,421 INFO L225 Difference]: With dead ends: 526 [2020-11-06 22:26:55,421 INFO L226 Difference]: Without dead ends: 523 [2020-11-06 22:26:55,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-11-06 22:26:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 458. [2020-11-06 22:26:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-11-06 22:26:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 624 transitions. [2020-11-06 22:26:55,455 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 624 transitions. Word has length 22 [2020-11-06 22:26:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:55,457 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 624 transitions. [2020-11-06 22:26:55,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 624 transitions. [2020-11-06 22:26:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:55,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:55,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:55,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 22:26:55,462 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:55,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1531256137, now seen corresponding path program 1 times [2020-11-06 22:26:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:55,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332087175] [2020-11-06 22:26:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:55,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332087175] [2020-11-06 22:26:55,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:55,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:55,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527153206] [2020-11-06 22:26:55,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:55,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:55,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:55,563 INFO L87 Difference]: Start difference. First operand 458 states and 624 transitions. Second operand 4 states. [2020-11-06 22:26:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:55,704 INFO L93 Difference]: Finished difference Result 1022 states and 1379 transitions. [2020-11-06 22:26:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:55,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:55,709 INFO L225 Difference]: With dead ends: 1022 [2020-11-06 22:26:55,710 INFO L226 Difference]: Without dead ends: 587 [2020-11-06 22:26:55,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-11-06 22:26:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 586. [2020-11-06 22:26:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-11-06 22:26:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2020-11-06 22:26:55,762 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 22 [2020-11-06 22:26:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:55,762 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2020-11-06 22:26:55,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2020-11-06 22:26:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:55,764 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:55,765 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] [2020-11-06 22:26:55,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-06 22:26:55,765 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash -470073733, now seen corresponding path program 1 times [2020-11-06 22:26:55,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:55,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832638508] [2020-11-06 22:26:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:55,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832638508] [2020-11-06 22:26:55,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:55,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:55,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227931182] [2020-11-06 22:26:55,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:55,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:55,846 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand 4 states. [2020-11-06 22:26:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:55,976 INFO L93 Difference]: Finished difference Result 878 states and 1131 transitions. [2020-11-06 22:26:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:55,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:26:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:55,981 INFO L225 Difference]: With dead ends: 878 [2020-11-06 22:26:55,981 INFO L226 Difference]: Without dead ends: 603 [2020-11-06 22:26:55,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-11-06 22:26:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-11-06 22:26:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-11-06 22:26:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 760 transitions. [2020-11-06 22:26:56,015 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 760 transitions. Word has length 23 [2020-11-06 22:26:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,015 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 760 transitions. [2020-11-06 22:26:56,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 760 transitions. [2020-11-06 22:26:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:56,017 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:56,017 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] [2020-11-06 22:26:56,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-06 22:26:56,018 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:56,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:56,018 INFO L82 PathProgramCache]: Analyzing trace with hash 230990845, now seen corresponding path program 1 times [2020-11-06 22:26:56,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:56,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261654716] [2020-11-06 22:26:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261654716] [2020-11-06 22:26:56,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999964013] [2020-11-06 22:26:56,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,076 INFO L87 Difference]: Start difference. First operand 602 states and 760 transitions. Second operand 4 states. [2020-11-06 22:26:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:56,248 INFO L93 Difference]: Finished difference Result 973 states and 1210 transitions. [2020-11-06 22:26:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:56,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:26:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:56,255 INFO L225 Difference]: With dead ends: 973 [2020-11-06 22:26:56,255 INFO L226 Difference]: Without dead ends: 970 [2020-11-06 22:26:56,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-11-06 22:26:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 906. [2020-11-06 22:26:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-11-06 22:26:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1112 transitions. [2020-11-06 22:26:56,301 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1112 transitions. Word has length 23 [2020-11-06 22:26:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,301 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1112 transitions. [2020-11-06 22:26:56,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1112 transitions. [2020-11-06 22:26:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:56,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:56,303 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] [2020-11-06 22:26:56,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-06 22:26:56,304 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash -162036165, now seen corresponding path program 1 times [2020-11-06 22:26:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:56,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135621688] [2020-11-06 22:26:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135621688] [2020-11-06 22:26:56,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440484884] [2020-11-06 22:26:56,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,368 INFO L87 Difference]: Start difference. First operand 906 states and 1112 transitions. Second operand 4 states. [2020-11-06 22:26:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:56,538 INFO L93 Difference]: Finished difference Result 1994 states and 2392 transitions. [2020-11-06 22:26:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:56,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:26:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:56,540 INFO L225 Difference]: With dead ends: 1994 [2020-11-06 22:26:56,540 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:26:56,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:26:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:26:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:26:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:26:56,545 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-11-06 22:26:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,545 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:26:56,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:26:56,546 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:26:56,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-06 22:26:56,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:26:57,382 WARN L194 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 32 [2020-11-06 22:26:57,430 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:26:57,431 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:26:57,431 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:26:57,431 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:26:57,431 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:26:57,431 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:26:57,432 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:26:57,432 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:26:57,432 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:26:57,432 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:26:57,432 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:26:57,432 INFO L266 CegarLoopResult]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,432 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2020-11-06 22:26:57,432 INFO L266 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point L95(line 95) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L269 CegarLoopResult]: At program point L105(lines 7 109) the Hoare annotation is: true [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-11-06 22:26:57,433 INFO L266 CegarLoopResult]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,434 INFO L269 CegarLoopResult]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2020-11-06 22:26:57,434 INFO L266 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-11-06 22:26:57,435 INFO L266 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-11-06 22:26:57,435 INFO L262 CegarLoopResult]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2020-11-06 22:26:57,435 INFO L266 CegarLoopResult]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,435 INFO L266 CegarLoopResult]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2020-11-06 22:26:57,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:26:57 BoogieIcfgContainer [2020-11-06 22:26:57,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:26:57,449 INFO L168 Benchmark]: Toolchain (without parser) took 7752.81 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 137.8 MB in the beginning and 119.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 104.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:26:57,450 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 162.5 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:26:57,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.70 ms. Allocated memory is still 162.5 MB. Free memory was 137.1 MB in the beginning and 127.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:26:57,451 INFO L168 Benchmark]: Boogie Preprocessor took 54.77 ms. Allocated memory is still 162.5 MB. Free memory was 127.5 MB in the beginning and 125.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:26:57,452 INFO L168 Benchmark]: RCFGBuilder took 749.80 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 140.5 MB in the end (delta: -14.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:26:57,452 INFO L168 Benchmark]: TraceAbstraction took 6531.09 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 140.0 MB in the beginning and 119.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 106.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:26:57,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 162.5 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 401.70 ms. Allocated memory is still 162.5 MB. Free memory was 137.1 MB in the beginning and 127.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.77 ms. Allocated memory is still 162.5 MB. Free memory was 127.5 MB in the beginning and 125.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 749.80 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 140.5 MB in the end (delta: -14.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6531.09 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 140.0 MB in the beginning and 119.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 106.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.5s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 893 SDtfs, 1206 SDslu, 125 SDs, 0 SdLazy, 644 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 254 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 90 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 212294 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 20197 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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 correct! Received shutdown request...