/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:52:44,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:52:44,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:52:44,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:52:44,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:52:44,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:52:44,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:52:44,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:52:44,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:52:44,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:52:44,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:52:44,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:52:44,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:52:44,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:52:44,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:52:44,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:52:44,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:52:44,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:52:44,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:52:44,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:52:44,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:52:44,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:52:44,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:52:44,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:52:44,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:52:44,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:52:44,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:52:44,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:52:44,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:52:44,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:52:44,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:52:44,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:52:44,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:52:44,995 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:52:44,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:52:44,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:52:44,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:52:44,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:52:44,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:52:44,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:52:44,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:52:44,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:52:44,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:52:45,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:52:45,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:52:45,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:52:45,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:52:45,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:52:45,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:52:45,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:52:45,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:52:45,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:52:45,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:52:45,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:52:45,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:52:45,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:52:45,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:52:45,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:52:45,622 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:52:45,623 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:52:45,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2020-12-22 23:52:45,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1ef55ebd5/f051842715df46868585f543dca43c21/FLAG3d5a98f6f [2020-12-22 23:52:46,431 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:52:46,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2020-12-22 23:52:46,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1ef55ebd5/f051842715df46868585f543dca43c21/FLAG3d5a98f6f [2020-12-22 23:52:46,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1ef55ebd5/f051842715df46868585f543dca43c21 [2020-12-22 23:52:46,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:52:46,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:52:46,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:46,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:52:46,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:52:46,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:46" (1/1) ... [2020-12-22 23:52:46,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b32aa21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:46, skipping insertion in model container [2020-12-22 23:52:46,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:46" (1/1) ... [2020-12-22 23:52:46,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:52:46,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:52:46,952 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:52:46,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:46,985 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:52:47,001 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:52:47,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:47,031 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:52:47,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47 WrapperNode [2020-12-22 23:52:47,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:47,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:47,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:52:47,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:52:47,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:47,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:52:47,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:52:47,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:52:47,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... [2020-12-22 23:52:47,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:52:47,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:52:47,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:52:47,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:52:47,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:52:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:52:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:52:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:52:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:52:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:52:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:52:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:52:47,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:52:47,854 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 23:52:47,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:47 BoogieIcfgContainer [2020-12-22 23:52:47,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:52:47,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:52:47,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:52:47,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:52:47,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:52:46" (1/3) ... [2020-12-22 23:52:47,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc1c48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:47, skipping insertion in model container [2020-12-22 23:52:47,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:47" (2/3) ... [2020-12-22 23:52:47,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc1c48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:47, skipping insertion in model container [2020-12-22 23:52:47,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:47" (3/3) ... [2020-12-22 23:52:47,882 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2020-12-22 23:52:47,903 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:52:47,912 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:52:47,948 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:52:47,980 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:52:47,981 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:52:47,981 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:52:47,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:52:47,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:52:47,982 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:52:47,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:52:47,982 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:52:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-22 23:52:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 23:52:48,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:48,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:48,006 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2020-12-22 23:52:48,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:48,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328236123] [2020-12-22 23:52:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:52:48,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328236123] [2020-12-22 23:52:48,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:52:48,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:52:48,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958393078] [2020-12-22 23:52:48,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:52:48,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:52:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:52:48,260 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-12-22 23:52:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:48,301 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2020-12-22 23:52:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:52:48,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 23:52:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:48,315 INFO L225 Difference]: With dead ends: 40 [2020-12-22 23:52:48,316 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 23:52:48,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:52:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 23:52:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-22 23:52:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 23:52:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-22 23:52:48,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2020-12-22 23:52:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:48,377 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-22 23:52:48,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:52:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-22 23:52:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 23:52:48,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:48,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:48,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:52:48,382 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2020-12-22 23:52:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:48,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853449206] [2020-12-22 23:52:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:52:48,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853449206] [2020-12-22 23:52:48,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133459571] [2020-12-22 23:52:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:48,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:52:48,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:48,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:52:48,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:52:48,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116873867] [2020-12-22 23:52:48,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:52:48,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:48,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:52:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:48,659 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2020-12-22 23:52:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:48,690 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-22 23:52:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:52:48,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-22 23:52:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:48,692 INFO L225 Difference]: With dead ends: 32 [2020-12-22 23:52:48,692 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 23:52:48,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 23:52:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-22 23:52:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 23:52:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-22 23:52:48,698 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-12-22 23:52:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:48,698 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-22 23:52:48,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:52:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-22 23:52:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:52:48,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:48,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:48,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:52:48,914 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2020-12-22 23:52:48,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:48,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852904889] [2020-12-22 23:52:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:52:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852904889] [2020-12-22 23:52:48,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564214120] [2020-12-22 23:52:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:52:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:52:49,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:49,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:52:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968459465] [2020-12-22 23:52:49,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:52:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:52:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:49,138 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-22 23:52:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:49,163 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-12-22 23:52:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:52:49,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 23:52:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:49,164 INFO L225 Difference]: With dead ends: 38 [2020-12-22 23:52:49,164 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 23:52:49,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 23:52:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 23:52:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 23:52:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-22 23:52:49,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-12-22 23:52:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:49,171 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-22 23:52:49,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:52:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-22 23:52:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:52:49,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:49,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:49,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:49,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash 34773395, now seen corresponding path program 2 times [2020-12-22 23:52:49,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:49,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432542192] [2020-12-22 23:52:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:52:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432542192] [2020-12-22 23:52:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795729545] [2020-12-22 23:52:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:49,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:49,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:52:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:52:49,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:49,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:52:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442527217] [2020-12-22 23:52:49,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:52:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:52:49,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:52:49,550 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-12-22 23:52:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:49,613 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-22 23:52:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:52:49,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 23:52:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:49,615 INFO L225 Difference]: With dead ends: 46 [2020-12-22 23:52:49,615 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 23:52:49,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:52:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 23:52:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-12-22 23:52:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 23:52:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 23:52:49,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-12-22 23:52:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:49,622 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 23:52:49,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:52:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 23:52:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 23:52:49,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:49,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:49,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:49,838 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1324303987, now seen corresponding path program 3 times [2020-12-22 23:52:49,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:49,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741391124] [2020-12-22 23:52:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 23:52:49,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741391124] [2020-12-22 23:52:49,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756205661] [2020-12-22 23:52:49,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:49,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:52:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:52:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:52:50,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:50,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 23:52:50,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439849911] [2020-12-22 23:52:50,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:52:50,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:50,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:52:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:52:50,037 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2020-12-22 23:52:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:50,110 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-22 23:52:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:52:50,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-22 23:52:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:50,111 INFO L225 Difference]: With dead ends: 56 [2020-12-22 23:52:50,111 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 23:52:50,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:52:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 23:52:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-12-22 23:52:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 23:52:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-22 23:52:50,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-12-22 23:52:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:50,120 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-22 23:52:50,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:52:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-22 23:52:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 23:52:50,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:50,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:50,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:50,335 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash -288016889, now seen corresponding path program 4 times [2020-12-22 23:52:50,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:50,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551315507] [2020-12-22 23:52:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 23:52:50,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551315507] [2020-12-22 23:52:50,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325977261] [2020-12-22 23:52:50,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:50,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:50,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:52:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 23:52:50,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:50,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:52:50,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048713085] [2020-12-22 23:52:50,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:52:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:50,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:52:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:52:50,582 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-12-22 23:52:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:50,616 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-12-22 23:52:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:52:50,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-22 23:52:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:50,618 INFO L225 Difference]: With dead ends: 60 [2020-12-22 23:52:50,618 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 23:52:50,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:52:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 23:52:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-22 23:52:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 23:52:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-22 23:52:50,626 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2020-12-22 23:52:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:50,626 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-22 23:52:50,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:52:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-22 23:52:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 23:52:50,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:50,628 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:50,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:52:50,844 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:50,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1946435387, now seen corresponding path program 5 times [2020-12-22 23:52:50,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:50,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735145289] [2020-12-22 23:52:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 23:52:50,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735145289] [2020-12-22 23:52:50,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054326344] [2020-12-22 23:52:50,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:51,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:52:51,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:52:51,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 23:52:51,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:51,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-22 23:52:51,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595520901] [2020-12-22 23:52:51,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:52:51,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:51,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:52:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:51,597 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 12 states. [2020-12-22 23:52:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:51,691 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-12-22 23:52:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:52:51,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-12-22 23:52:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:51,695 INFO L225 Difference]: With dead ends: 68 [2020-12-22 23:52:51,695 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 23:52:51,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 23:52:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-22 23:52:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 23:52:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-22 23:52:51,715 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2020-12-22 23:52:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:51,716 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-22 23:52:51,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:52:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-22 23:52:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 23:52:51,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:51,720 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:51,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:51,921 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash -287853761, now seen corresponding path program 6 times [2020-12-22 23:52:51,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:51,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379928366] [2020-12-22 23:52:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 23:52:52,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379928366] [2020-12-22 23:52:52,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684308368] [2020-12-22 23:52:52,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:52,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:52:52,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:52:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 23:52:52,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:52,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-22 23:52:52,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409435055] [2020-12-22 23:52:52,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:52:52,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:52:52,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:52:52,357 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 14 states. [2020-12-22 23:52:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:52,485 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-12-22 23:52:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:52:52,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-12-22 23:52:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:52,491 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:52:52,491 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 23:52:52,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:52:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 23:52:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-22 23:52:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 23:52:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-12-22 23:52:52,507 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2020-12-22 23:52:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:52,507 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-12-22 23:52:52,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:52:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-12-22 23:52:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:52:52,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:52,508 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:52,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:52,713 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:52,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2091000377, now seen corresponding path program 7 times [2020-12-22 23:52:52,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:52,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078286024] [2020-12-22 23:52:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 23:52:52,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078286024] [2020-12-22 23:52:52,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789554387] [2020-12-22 23:52:52,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:52:52,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 23:52:52,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:52,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:52:52,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253508450] [2020-12-22 23:52:52,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:52:52,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:52,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:52:52,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:52,981 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 11 states. [2020-12-22 23:52:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:53,018 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-12-22 23:52:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:52:53,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-12-22 23:52:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:53,020 INFO L225 Difference]: With dead ends: 82 [2020-12-22 23:52:53,020 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 23:52:53,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 23:52:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-22 23:52:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 23:52:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-22 23:52:53,026 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2020-12-22 23:52:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:53,026 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-22 23:52:53,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:52:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-22 23:52:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 23:52:53,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:53,027 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:53,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:52:53,241 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash 392693879, now seen corresponding path program 8 times [2020-12-22 23:52:53,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:53,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494728572] [2020-12-22 23:52:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 23:52:53,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494728572] [2020-12-22 23:52:53,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11681378] [2020-12-22 23:52:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:53,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:53,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:52:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 23:52:53,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:53,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:52:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256130841] [2020-12-22 23:52:53,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:52:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:52:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:53,616 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 12 states. [2020-12-22 23:52:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:53,665 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-12-22 23:52:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:52:53,666 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-12-22 23:52:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:53,667 INFO L225 Difference]: With dead ends: 84 [2020-12-22 23:52:53,667 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 23:52:53,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 23:52:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-22 23:52:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 23:52:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 23:52:53,673 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 47 [2020-12-22 23:52:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:53,673 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 23:52:53,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:52:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 23:52:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 23:52:53,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:53,674 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:53,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:53,889 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash 407721781, now seen corresponding path program 9 times [2020-12-22 23:52:53,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:53,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826001132] [2020-12-22 23:52:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 23:52:54,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826001132] [2020-12-22 23:52:54,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901926650] [2020-12-22 23:52:54,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:54,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:52:54,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:52:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-22 23:52:54,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:54,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-22 23:52:54,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219202357] [2020-12-22 23:52:54,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:52:54,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:52:54,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:52:54,564 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 18 states. [2020-12-22 23:52:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:54,696 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-12-22 23:52:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:52:54,697 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-12-22 23:52:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:54,697 INFO L225 Difference]: With dead ends: 92 [2020-12-22 23:52:54,697 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:52:54,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:52:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:52:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-22 23:52:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 23:52:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-12-22 23:52:54,704 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-12-22 23:52:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:54,704 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-12-22 23:52:54,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:52:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-12-22 23:52:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:52:54,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:54,706 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:54,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:54,920 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash -589679185, now seen corresponding path program 10 times [2020-12-22 23:52:54,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:54,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131446263] [2020-12-22 23:52:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:52:55,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131446263] [2020-12-22 23:52:55,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828361125] [2020-12-22 23:52:55,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:55,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:55,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:55,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:52:55,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:52:55,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:55,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:52:55,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092607358] [2020-12-22 23:52:55,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:52:55,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:55,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:52:55,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:52:55,264 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 14 states. [2020-12-22 23:52:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:55,313 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-12-22 23:52:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:52:55,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-12-22 23:52:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:55,314 INFO L225 Difference]: With dead ends: 96 [2020-12-22 23:52:55,314 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:52:55,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:52:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:52:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-22 23:52:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 23:52:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-12-22 23:52:55,320 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 55 [2020-12-22 23:52:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:55,321 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-12-22 23:52:55,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:52:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-12-22 23:52:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 23:52:55,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:55,322 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:55,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:52:55,537 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:55,538 INFO L82 PathProgramCache]: Analyzing trace with hash 224126573, now seen corresponding path program 11 times [2020-12-22 23:52:55,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:55,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727670045] [2020-12-22 23:52:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:52:55,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727670045] [2020-12-22 23:52:55,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759459972] [2020-12-22 23:52:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:49,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 23:53:49,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:49,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:53:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-22 23:53:50,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:50,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-12-22 23:53:50,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600697625] [2020-12-22 23:53:50,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:53:50,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:50,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:53:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:53:50,131 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 21 states. [2020-12-22 23:53:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:50,277 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-12-22 23:53:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:53:50,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-12-22 23:53:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:50,279 INFO L225 Difference]: With dead ends: 104 [2020-12-22 23:53:50,279 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:53:50,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:53:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:53:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-22 23:53:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 23:53:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-12-22 23:53:50,286 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 57 [2020-12-22 23:53:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:50,287 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-12-22 23:53:50,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:53:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-12-22 23:53:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 23:53:50,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:50,288 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:50,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:53:50,504 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1552038631, now seen corresponding path program 12 times [2020-12-22 23:53:50,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:50,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521580725] [2020-12-22 23:53:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-22 23:53:50,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521580725] [2020-12-22 23:53:50,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005542899] [2020-12-22 23:53:50,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:55,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:53:55,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:55,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:53:55,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-12-22 23:53:55,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:55,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-12-22 23:53:55,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76524734] [2020-12-22 23:53:55,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:53:55,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:53:55,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:53:55,423 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 23 states. [2020-12-22 23:53:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:55,621 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-12-22 23:53:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:53:55,622 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 23:53:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:55,623 INFO L225 Difference]: With dead ends: 114 [2020-12-22 23:53:55,623 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 23:53:55,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:53:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 23:53:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-22 23:53:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:53:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-12-22 23:53:55,636 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 63 [2020-12-22 23:53:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:55,637 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-12-22 23:53:55,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:53:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-12-22 23:53:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:53:55,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:55,638 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:55,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:53:55,842 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash -670200863, now seen corresponding path program 13 times [2020-12-22 23:53:55,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:55,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422433321] [2020-12-22 23:53:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-22 23:53:56,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422433321] [2020-12-22 23:53:56,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086465686] [2020-12-22 23:53:56,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:53:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-22 23:53:56,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:56,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:53:56,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717081080] [2020-12-22 23:53:56,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:53:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:56,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:53:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:53:56,259 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 17 states. [2020-12-22 23:53:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:56,323 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-12-22 23:53:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:53:56,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-12-22 23:53:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:56,325 INFO L225 Difference]: With dead ends: 118 [2020-12-22 23:53:56,325 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 23:53:56,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:53:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 23:53:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 23:53:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 23:53:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-12-22 23:53:56,351 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 69 [2020-12-22 23:53:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:56,351 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-12-22 23:53:56,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:53:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-12-22 23:53:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 23:53:56,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:56,352 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:56,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:56,570 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:56,571 INFO L82 PathProgramCache]: Analyzing trace with hash 481564703, now seen corresponding path program 14 times [2020-12-22 23:53:56,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:56,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771042197] [2020-12-22 23:53:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-22 23:53:56,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771042197] [2020-12-22 23:53:56,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537422936] [2020-12-22 23:53:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:56,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:53:56,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:56,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:53:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-22 23:53:57,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:57,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:53:57,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356170955] [2020-12-22 23:53:57,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:53:57,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:53:57,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:53:57,029 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 18 states. [2020-12-22 23:53:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:57,103 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-12-22 23:53:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:53:57,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-12-22 23:53:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:57,105 INFO L225 Difference]: With dead ends: 120 [2020-12-22 23:53:57,105 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 23:53:57,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:53:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 23:53:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-22 23:53:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 23:53:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-12-22 23:53:57,111 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 71 [2020-12-22 23:53:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:57,111 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-12-22 23:53:57,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:53:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-12-22 23:53:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 23:53:57,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:57,113 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:57,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:53:57,327 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash -773288739, now seen corresponding path program 15 times [2020-12-22 23:53:57,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:57,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586338714] [2020-12-22 23:53:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-22 23:53:57,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586338714] [2020-12-22 23:53:57,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282208610] [2020-12-22 23:53:57,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 23:53:59,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:53:59,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:53:59,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:59,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-12-22 23:53:59,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55614474] [2020-12-22 23:53:59,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:53:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:53:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:53:59,394 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 27 states. [2020-12-22 23:53:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:59,601 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-22 23:53:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:53:59,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-12-22 23:53:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:59,602 INFO L225 Difference]: With dead ends: 128 [2020-12-22 23:53:59,603 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 23:53:59,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:53:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 23:53:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-22 23:53:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 23:53:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-12-22 23:53:59,608 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 73 [2020-12-22 23:53:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:59,608 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-12-22 23:53:59,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:53:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-12-22 23:53:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 23:53:59,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:59,609 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:59,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:53:59,824 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash -859583145, now seen corresponding path program 16 times [2020-12-22 23:53:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:59,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349601804] [2020-12-22 23:53:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-22 23:54:00,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349601804] [2020-12-22 23:54:00,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225779110] [2020-12-22 23:54:00,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:54:00,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:54:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:54:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:54:00,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:54:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-12-22 23:54:00,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:54:00,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2020-12-22 23:54:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714838867] [2020-12-22 23:54:00,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:54:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:54:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:54:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:54:00,412 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 29 states. [2020-12-22 23:54:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:54:00,626 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-12-22 23:54:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:54:00,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-12-22 23:54:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:54:00,628 INFO L225 Difference]: With dead ends: 138 [2020-12-22 23:54:00,628 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 23:54:00,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:54:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 23:54:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-12-22 23:54:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 23:54:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-12-22 23:54:00,633 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2020-12-22 23:54:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:54:00,633 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-12-22 23:54:00,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:54:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-12-22 23:54:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 23:54:00,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:54:00,634 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:54:00,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:54:00,847 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:54:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:54:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1574111825, now seen corresponding path program 17 times [2020-12-22 23:54:00,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:54:00,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242742675] [2020-12-22 23:54:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:54:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-22 23:54:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242742675] [2020-12-22 23:54:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268751901] [2020-12-22 23:54:01,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true