/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_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:02:37,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:02:37,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:02:37,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:02:37,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:02:37,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:02:37,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:02:37,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:02:37,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:02:37,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:02:37,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:02:37,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:02:37,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:02:37,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:02:37,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:02:37,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:02:37,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:02:37,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:02:37,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:02:37,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:02:37,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:02:37,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:02:37,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:02:37,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:02:37,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:02:37,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:02:37,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:02:37,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:02:37,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:02:37,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:02:37,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:02:37,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:02:37,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:02:37,734 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:02:37,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:02:37,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:02:37,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:02:37,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:02:37,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:02:37,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:02:37,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:02:37,737 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:02:37,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:02:37,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:02:37,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:02:37,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:02:37,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:02:37,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:02:37,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:02:37,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:02:37,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:02:37,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:02:37,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:02:37,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:02:37,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:02:38,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:02:38,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:02:38,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:02:38,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:02:38,215 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:02:38,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2020-12-23 00:02:38,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d47e6ceb4/1cdea5b4b2d94958a0bf7c15cc970a6a/FLAG9926c9271 [2020-12-23 00:02:38,922 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:02:38,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2020-12-23 00:02:38,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d47e6ceb4/1cdea5b4b2d94958a0bf7c15cc970a6a/FLAG9926c9271 [2020-12-23 00:02:39,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d47e6ceb4/1cdea5b4b2d94958a0bf7c15cc970a6a [2020-12-23 00:02:39,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:02:39,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:02:39,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:39,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:02:39,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:02:39,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5230547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39, skipping insertion in model container [2020-12-23 00:02:39,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:02:39,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:02:39,529 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_init7_ground-2.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:02:39,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:39,581 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:02:39,599 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_init7_ground-2.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~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: lhs: VariableLHS[~x~0,] [2020-12-23 00:02:39,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:39,663 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:02:39,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39 WrapperNode [2020-12-23 00:02:39,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:39,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:39,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:02:39,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:02:39,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:39,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:02:39,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:02:39,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:02:39,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... [2020-12-23 00:02:39,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:02:39,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:02:39,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:02:39,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:02:39,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:02:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:02:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:02:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:02:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:02:39,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:02:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:02:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:02:40,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:02:40,383 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 00:02:40,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:40 BoogieIcfgContainer [2020-12-23 00:02:40,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:02:40,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:02:40,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:02:40,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:02:40,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:02:39" (1/3) ... [2020-12-23 00:02:40,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3bce67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:40, skipping insertion in model container [2020-12-23 00:02:40,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:39" (2/3) ... [2020-12-23 00:02:40,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3bce67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:40, skipping insertion in model container [2020-12-23 00:02:40,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:40" (3/3) ... [2020-12-23 00:02:40,394 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2020-12-23 00:02:40,401 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:02:40,407 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:02:40,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:02:40,453 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:02:40,453 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:02:40,453 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:02:40,453 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:02:40,453 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:02:40,453 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:02:40,454 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:02:40,454 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:02:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-23 00:02:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:02:40,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:40,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:40,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash -495328290, now seen corresponding path program 1 times [2020-12-23 00:02:40,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:40,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269243417] [2020-12-23 00:02:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:40,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269243417] [2020-12-23 00:02:40,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:02:40,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:02:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842065232] [2020-12-23 00:02:40,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:02:40,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:40,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:02:40,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:02:40,692 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-12-23 00:02:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:40,804 INFO L93 Difference]: Finished difference Result 56 states and 100 transitions. [2020-12-23 00:02:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:02:40,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:02:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:40,815 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:02:40,815 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:02:40,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:02:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:02:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 00:02:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:02:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-23 00:02:40,857 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2020-12-23 00:02:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:40,858 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-23 00:02:40,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:02:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-23 00:02:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:02:40,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:40,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:40,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:02:40,860 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1838625458, now seen corresponding path program 1 times [2020-12-23 00:02:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:40,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095282342] [2020-12-23 00:02:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:02:40,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095282342] [2020-12-23 00:02:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141029965] [2020-12-23 00:02:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:40,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:02:40,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:02:41,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:41,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:02:41,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651032127] [2020-12-23 00:02:41,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:02:41,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:41,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:02:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:02:41,061 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2020-12-23 00:02:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:41,147 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-12-23 00:02:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:02:41,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 00:02:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:41,149 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:02:41,149 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:02:41,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:02:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:02:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 00:02:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:02:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-23 00:02:41,158 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 26 [2020-12-23 00:02:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:41,159 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-23 00:02:41,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:02:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-23 00:02:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:02:41,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:41,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:41,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:02:41,374 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:41,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:41,375 INFO L82 PathProgramCache]: Analyzing trace with hash 469832922, now seen corresponding path program 2 times [2020-12-23 00:02:41,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:41,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163763965] [2020-12-23 00:02:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:02:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163763965] [2020-12-23 00:02:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616271840] [2020-12-23 00:02:41,533 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:41,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:02:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:02:41,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:41,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:02:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068691851] [2020-12-23 00:02:41,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:02:41,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:02:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:02:41,722 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-12-23 00:02:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:41,847 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-23 00:02:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:02:41,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-23 00:02:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:41,849 INFO L225 Difference]: With dead ends: 74 [2020-12-23 00:02:41,849 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:02:41,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:02:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:02:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 00:02:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:02:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-23 00:02:41,860 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2020-12-23 00:02:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:41,861 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-23 00:02:41,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:02:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-23 00:02:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:02:41,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:41,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:42,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:42,077 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash -467565902, now seen corresponding path program 3 times [2020-12-23 00:02:42,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:42,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056794502] [2020-12-23 00:02:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:02:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056794502] [2020-12-23 00:02:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163142016] [2020-12-23 00:02:42,168 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:42,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:02:42,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:42,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:02:42,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:02:42,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:42,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:02:42,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520748065] [2020-12-23 00:02:42,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:02:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:42,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:02:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:02:42,332 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 7 states. [2020-12-23 00:02:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:42,424 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2020-12-23 00:02:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:02:42,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-23 00:02:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:42,426 INFO L225 Difference]: With dead ends: 87 [2020-12-23 00:02:42,426 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:02:42,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:02:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:02:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 00:02:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:02:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-12-23 00:02:42,435 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 40 [2020-12-23 00:02:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:42,435 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-12-23 00:02:42,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:02:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-12-23 00:02:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:02:42,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:42,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:42,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:42,653 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:42,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1915847130, now seen corresponding path program 4 times [2020-12-23 00:02:42,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:42,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797667834] [2020-12-23 00:02:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 00:02:42,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797667834] [2020-12-23 00:02:42,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696379620] [2020-12-23 00:02:42,748 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:42,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:02:42,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:02:42,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 00:02:42,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:42,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:02:42,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565055595] [2020-12-23 00:02:42,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:02:42,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:02:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:02:42,876 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2020-12-23 00:02:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:42,997 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-12-23 00:02:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:02:42,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-12-23 00:02:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:42,999 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:02:42,999 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:02:43,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:02:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:02:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 00:02:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 00:02:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-12-23 00:02:43,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 47 [2020-12-23 00:02:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:43,014 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-12-23 00:02:43,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:02:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-12-23 00:02:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:02:43,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:43,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:43,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:43,222 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:43,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2119946930, now seen corresponding path program 5 times [2020-12-23 00:02:43,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:43,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317536675] [2020-12-23 00:02:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-23 00:02:43,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317536675] [2020-12-23 00:02:43,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467192359] [2020-12-23 00:02:43,353 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:46,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:02:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:02:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-23 00:02:46,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:46,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:02:46,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220021414] [2020-12-23 00:02:46,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:02:46,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:02:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:02:46,607 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 9 states. [2020-12-23 00:02:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:46,739 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2020-12-23 00:02:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:02:46,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-23 00:02:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:46,741 INFO L225 Difference]: With dead ends: 113 [2020-12-23 00:02:46,741 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 00:02:46,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:02:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 00:02:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 00:02:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:02:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-12-23 00:02:46,750 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 54 [2020-12-23 00:02:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:46,751 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-12-23 00:02:46,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:02:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-12-23 00:02:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:02:46,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:46,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:46,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:02:46,968 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1499557594, now seen corresponding path program 6 times [2020-12-23 00:02:46,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:46,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845801200] [2020-12-23 00:02:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 00:02:47,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845801200] [2020-12-23 00:02:47,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699264759] [2020-12-23 00:02:47,077 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:48,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:02:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:02:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 00:02:48,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:48,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:02:48,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054825034] [2020-12-23 00:02:48,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:02:48,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:02:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:02:48,306 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2020-12-23 00:02:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:48,421 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-12-23 00:02:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:02:48,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-23 00:02:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:48,426 INFO L225 Difference]: With dead ends: 126 [2020-12-23 00:02:48,426 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:02:48,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:02:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:02:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-23 00:02:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 00:02:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-12-23 00:02:48,447 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 61 [2020-12-23 00:02:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:48,448 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-12-23 00:02:48,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:02:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-12-23 00:02:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 00:02:48,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:48,449 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:48,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:48,663 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -664919374, now seen corresponding path program 7 times [2020-12-23 00:02:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:48,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13412003] [2020-12-23 00:02:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-23 00:02:48,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13412003] [2020-12-23 00:02:48,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933555561] [2020-12-23 00:02:48,855 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:48,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:02:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-23 00:02:49,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:49,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:02:49,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317194244] [2020-12-23 00:02:49,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:02:49,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:49,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:02:49,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:02:49,046 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 11 states. [2020-12-23 00:02:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:49,202 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2020-12-23 00:02:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:02:49,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-12-23 00:02:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:49,205 INFO L225 Difference]: With dead ends: 139 [2020-12-23 00:02:49,206 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:02:49,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:02:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:02:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-23 00:02:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:02:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-12-23 00:02:49,226 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 68 [2020-12-23 00:02:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:49,226 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-12-23 00:02:49,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:02:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-12-23 00:02:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:02:49,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:49,230 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:49,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:49,431 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 184081370, now seen corresponding path program 8 times [2020-12-23 00:02:49,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:49,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403979529] [2020-12-23 00:02:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-23 00:02:49,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403979529] [2020-12-23 00:02:49,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132154841] [2020-12-23 00:02:49,611 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:49,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:49,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:02:49,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-23 00:02:49,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:49,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:02:49,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326612045] [2020-12-23 00:02:49,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:02:49,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:02:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:02:49,791 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 12 states. [2020-12-23 00:02:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:49,947 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-12-23 00:02:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:02:49,948 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-12-23 00:02:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:49,949 INFO L225 Difference]: With dead ends: 152 [2020-12-23 00:02:49,949 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:02:49,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:02:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:02:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-23 00:02:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:02:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-23 00:02:49,971 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 75 [2020-12-23 00:02:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:49,972 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-23 00:02:49,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:02:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-23 00:02:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:02:49,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:49,975 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:50,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:02:50,190 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash -96439630, now seen corresponding path program 9 times [2020-12-23 00:02:50,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:50,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803280429] [2020-12-23 00:02:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-12-23 00:02:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803280429] [2020-12-23 00:02:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688477092] [2020-12-23 00:02:50,355 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:59,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:02:59,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:02:59,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-12-23 00:02:59,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:59,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:02:59,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764641154] [2020-12-23 00:02:59,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:02:59,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:02:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:02:59,753 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 13 states. [2020-12-23 00:02:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:59,931 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2020-12-23 00:02:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:02:59,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-12-23 00:02:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:59,933 INFO L225 Difference]: With dead ends: 165 [2020-12-23 00:02:59,933 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:02:59,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:02:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:02:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-23 00:02:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:02:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-12-23 00:02:59,939 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 82 [2020-12-23 00:02:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:59,939 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-12-23 00:02:59,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:02:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-12-23 00:02:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:02:59,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:59,941 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:00,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:00,142 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:00,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1268791078, now seen corresponding path program 10 times [2020-12-23 00:03:00,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:00,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468762659] [2020-12-23 00:03:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:03:00,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468762659] [2020-12-23 00:03:00,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225184365] [2020-12-23 00:03:00,315 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 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 [2020-12-23 00:03:00,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:03:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:03:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:03:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:03:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:03:00,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:03:00,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:03:00,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489972661] [2020-12-23 00:03:00,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:03:00,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:03:00,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:03:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:03:00,491 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 14 states. [2020-12-23 00:03:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:03:00,679 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2020-12-23 00:03:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:03:00,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-12-23 00:03:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:03:00,680 INFO L225 Difference]: With dead ends: 178 [2020-12-23 00:03:00,680 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 00:03:00,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:03:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 00:03:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-23 00:03:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 00:03:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2020-12-23 00:03:00,687 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 89 [2020-12-23 00:03:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:03:00,687 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2020-12-23 00:03:00,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:03:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2020-12-23 00:03:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 00:03:00,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:03:00,688 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:00,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:00,902 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:00,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash -669334862, now seen corresponding path program 11 times [2020-12-23 00:03:00,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:00,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010410833] [2020-12-23 00:03:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-12-23 00:03:01,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010410833] [2020-12-23 00:03:01,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689665509] [2020-12-23 00:03:01,111 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 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