/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/nla-digbench-scaling/prod4br-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:01:33,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:01:33,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:01:33,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:01:33,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:01:33,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:01:33,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:01:33,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:01:33,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:01:33,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:01:33,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:01:33,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:01:33,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:01:33,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:01:33,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:01:33,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:01:33,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:01:33,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:01:33,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:01:33,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:01:33,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:01:33,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:01:33,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:01:33,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:01:33,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:01:33,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:01:33,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:01:33,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:01:33,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:01:33,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:01:33,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:01:33,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:01:33,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:01:33,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:01:33,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:01:33,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:01:33,259 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 08:01:33,303 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:01:33,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:01:33,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:01:33,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:01:33,308 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:01:33,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:01:33,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:01:33,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:01:33,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:01:33,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:01:33,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:01:33,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:01:33,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:01:33,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:01:33,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:01:33,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:01:33,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:01:33,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:01:33,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:01:33,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:01:33,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:01:33,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:01:33,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:01:33,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:01:33,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:01:33,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:01:33,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:01:33,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:01:33,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:01:33,773 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:01:33,774 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:01:33,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2020-12-23 08:01:33,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b293db2f0/e3b7a94e9c3a44d2a6e0dffa485c2bcb/FLAGb3060ed38 [2020-12-23 08:01:34,420 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:01:34,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2020-12-23 08:01:34,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b293db2f0/e3b7a94e9c3a44d2a6e0dffa485c2bcb/FLAGb3060ed38 [2020-12-23 08:01:34,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b293db2f0/e3b7a94e9c3a44d2a6e0dffa485c2bcb [2020-12-23 08:01:34,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:01:34,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:01:34,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:34,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:01:34,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:01:34,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:34" (1/1) ... [2020-12-23 08:01:34,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34bf38f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:34, skipping insertion in model container [2020-12-23 08:01:34,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:34" (1/1) ... [2020-12-23 08:01:34,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:01:34,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:01:34,995 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/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2020-12-23 08:01:35,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:35,033 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:01:35,048 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/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2020-12-23 08:01:35,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:35,086 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:01:35,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35 WrapperNode [2020-12-23 08:01:35,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:35,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:35,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:01:35,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:01:35,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:35,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:01:35,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:01:35,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:01:35,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (1/1) ... [2020-12-23 08:01:35,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:01:35,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:01:35,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:01:35,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:01:35,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (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 08:01:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:01:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:01:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:01:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:01:35,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:01:35,771 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:01:35,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:35 BoogieIcfgContainer [2020-12-23 08:01:35,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:01:35,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:01:35,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:01:35,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:01:35,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:01:34" (1/3) ... [2020-12-23 08:01:35,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c17f63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:35, skipping insertion in model container [2020-12-23 08:01:35,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:35" (2/3) ... [2020-12-23 08:01:35,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c17f63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:35, skipping insertion in model container [2020-12-23 08:01:35,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:35" (3/3) ... [2020-12-23 08:01:35,782 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2020-12-23 08:01:35,789 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:01:35,794 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 08:01:35,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 08:01:35,873 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:01:35,874 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:01:35,874 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:01:35,874 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:01:35,874 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:01:35,874 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:01:35,878 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:01:35,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:01:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 08:01:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:01:35,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:35,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:35,907 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2020-12-23 08:01:35,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:35,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301989419] [2020-12-23 08:01:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:36,168 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 08:01:36,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301989419] [2020-12-23 08:01:36,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:36,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:01:36,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616790705] [2020-12-23 08:01:36,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:01:36,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:36,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:01:36,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:36,204 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-23 08:01:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:36,226 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-12-23 08:01:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:01:36,228 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 08:01:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:36,253 INFO L225 Difference]: With dead ends: 47 [2020-12-23 08:01:36,253 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 08:01:36,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 08:01:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 08:01:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 08:01:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 08:01:36,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2020-12-23 08:01:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:36,307 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 08:01:36,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:01:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 08:01:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:01:36,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:36,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:36,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:01:36,312 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 08:01:36,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:36,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123701073] [2020-12-23 08:01:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:36,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:36,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266062195] [2020-12-23 08:01:36,366 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 08:01:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 08:01:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:36,581 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 08:01:36,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123701073] [2020-12-23 08:01:36,582 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:36,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266062195] [2020-12-23 08:01:36,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:36,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 08:01:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468920587] [2020-12-23 08:01:36,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:01:36,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:36,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:01:36,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:36,586 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-12-23 08:01:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:36,829 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-23 08:01:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:01:36,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 08:01:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:36,831 INFO L225 Difference]: With dead ends: 42 [2020-12-23 08:01:36,831 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 08:01:36,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:01:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 08:01:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2020-12-23 08:01:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 08:01:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 08:01:36,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2020-12-23 08:01:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:36,841 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 08:01:36,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:01:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 08:01:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 08:01:36,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:36,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:37,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:01:37,056 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2020-12-23 08:01:37,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:37,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859696751] [2020-12-23 08:01:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:37,112 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 08:01:37,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859696751] [2020-12-23 08:01:37,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:37,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 08:01:37,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200726706] [2020-12-23 08:01:37,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:01:37,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:01:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:37,115 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-12-23 08:01:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:37,133 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-23 08:01:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:01:37,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 08:01:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:37,135 INFO L225 Difference]: With dead ends: 32 [2020-12-23 08:01:37,136 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 08:01:37,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 08:01:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 08:01:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 08:01:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 08:01:37,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-12-23 08:01:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:37,143 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 08:01:37,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:01:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 08:01:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 08:01:37,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:37,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:37,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 08:01:37,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2020-12-23 08:01:37,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:37,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622804726] [2020-12-23 08:01:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:37,160 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:37,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521763810] [2020-12-23 08:01:37,161 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 [2020-12-23 08:01:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:37,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:01:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:37,320 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:01:37,978 WARN L197 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-23 08:01:38,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:01:38,055 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 08:01:38,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 08:01:38,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 08:01:38,098 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 08:01:38,107 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 08:01:38,169 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 08:01:38,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622804726] [2020-12-23 08:01:38,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:38,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521763810] [2020-12-23 08:01:38,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:38,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 08:01:38,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832662515] [2020-12-23 08:01:38,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:01:38,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:38,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:01:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:01:38,172 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2020-12-23 08:01:40,531 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-23 08:01:40,693 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-12-23 08:01:40,860 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2020-12-23 08:01:44,056 WARN L197 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-23 08:01:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:44,237 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-12-23 08:01:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 08:01:44,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 08:01:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:44,241 INFO L225 Difference]: With dead ends: 52 [2020-12-23 08:01:44,241 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 08:01:44,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-12-23 08:01:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 08:01:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-12-23 08:01:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 08:01:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-23 08:01:44,251 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 11 [2020-12-23 08:01:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:44,251 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-23 08:01:44,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:01:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-23 08:01:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:01:44,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:44,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:44,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:44,466 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2020-12-23 08:01:44,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:44,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630079461] [2020-12-23 08:01:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:44,482 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:44,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188704050] [2020-12-23 08:01:44,482 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 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 08:01:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 08:01:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:46,771 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-23 08:01:46,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:01:46,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:01:46,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 08:01:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:48,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630079461] [2020-12-23 08:01:48,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:48,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188704050] [2020-12-23 08:01:48,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:48,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:01:48,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295500383] [2020-12-23 08:01:48,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:48,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:48,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:48,980 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 8 states. [2020-12-23 08:01:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:51,583 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-12-23 08:01:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:01:51,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 08:01:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:51,586 INFO L225 Difference]: With dead ends: 66 [2020-12-23 08:01:51,586 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 08:01:51,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 08:01:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 08:01:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2020-12-23 08:01:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 08:01:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-12-23 08:01:51,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 13 [2020-12-23 08:01:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:51,599 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-12-23 08:01:51,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:01:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-12-23 08:01:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:01:51,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:51,601 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:51,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:51,817 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2020-12-23 08:01:51,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:51,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554172703] [2020-12-23 08:01:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:51,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:51,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699117433] [2020-12-23 08:01:51,830 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 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 08:01:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:01:51,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:51,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554172703] [2020-12-23 08:01:51,915 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:51,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699117433] [2020-12-23 08:01:51,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:51,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:01:51,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271990754] [2020-12-23 08:01:51,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:01:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:01:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:01:51,917 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 5 states. [2020-12-23 08:01:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:51,956 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-12-23 08:01:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:01:51,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 08:01:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:51,958 INFO L225 Difference]: With dead ends: 49 [2020-12-23 08:01:51,958 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 08:01:51,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 08:01:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 08:01:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 08:01:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-12-23 08:01:51,966 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 14 [2020-12-23 08:01:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:51,967 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-12-23 08:01:51,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:01:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-12-23 08:01:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:01:51,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:51,970 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:52,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:52,171 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:52,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1175899963, now seen corresponding path program 1 times [2020-12-23 08:01:52,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:52,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239291977] [2020-12-23 08:01:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:52,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:52,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184800505] [2020-12-23 08:01:52,185 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 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 08:01:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 08:01:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:54,496 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-23 08:01:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:54,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239291977] [2020-12-23 08:01:54,563 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:54,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184800505] [2020-12-23 08:01:54,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:54,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:01:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352738794] [2020-12-23 08:01:54,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:54,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:54,565 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 8 states. [2020-12-23 08:02:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:01,336 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-12-23 08:02:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:02:01,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 08:02:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:01,338 INFO L225 Difference]: With dead ends: 53 [2020-12-23 08:02:01,338 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 08:02:01,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:02:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 08:02:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-12-23 08:02:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 08:02:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-12-23 08:02:01,347 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2020-12-23 08:02:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:01,347 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-12-23 08:02:01,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:02:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-12-23 08:02:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:02:01,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:01,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:01,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 08:02:01,562 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2112377150, now seen corresponding path program 1 times [2020-12-23 08:02:01,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:01,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639993002] [2020-12-23 08:02:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:01,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:01,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52795790] [2020-12-23 08:02:01,575 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 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 08:02:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 08:02:01,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:01,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639993002] [2020-12-23 08:02:01,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:01,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52795790] [2020-12-23 08:02:01,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:01,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:02:01,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269209386] [2020-12-23 08:02:01,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:02:01,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:01,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:02:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:02:01,830 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 7 states. [2020-12-23 08:02:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:04,246 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2020-12-23 08:02:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:02:04,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 08:02:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:04,250 INFO L225 Difference]: With dead ends: 54 [2020-12-23 08:02:04,250 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 08:02:04,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:02:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 08:02:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-12-23 08:02:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 08:02:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-12-23 08:02:04,267 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 15 [2020-12-23 08:02:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:04,267 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-12-23 08:02:04,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:02:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-12-23 08:02:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:02:04,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:04,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:04,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:04,472 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2114224192, now seen corresponding path program 1 times [2020-12-23 08:02:04,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:04,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116220992] [2020-12-23 08:02:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:04,484 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:04,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813104436] [2020-12-23 08:02:04,484 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 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 08:02:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:04,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 08:02:04,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:08,810 WARN L197 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-23 08:02:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:08,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116220992] [2020-12-23 08:02:08,963 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:08,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813104436] [2020-12-23 08:02:08,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:08,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:02:08,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261335722] [2020-12-23 08:02:08,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:02:08,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:08,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:02:08,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:02:08,965 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-12-23 08:02:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:11,496 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-12-23 08:02:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:02:11,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-23 08:02:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:11,498 INFO L225 Difference]: With dead ends: 52 [2020-12-23 08:02:11,498 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 08:02:11,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:02:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 08:02:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-12-23 08:02:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 08:02:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-12-23 08:02:11,506 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 15 [2020-12-23 08:02:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:11,506 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-12-23 08:02:11,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:02:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-12-23 08:02:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:02:11,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:11,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:11,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:11,721 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2020-12-23 08:02:11,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:11,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773204587] [2020-12-23 08:02:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:11,738 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:11,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905869341] [2020-12-23 08:02:11,739 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 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 08:02:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 08:02:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:11,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773204587] [2020-12-23 08:02:11,908 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:11,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905869341] [2020-12-23 08:02:11,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:02:11,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 08:02:11,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107918585] [2020-12-23 08:02:11,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:02:11,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:11,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:02:11,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:02:11,910 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-12-23 08:02:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:12,109 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-12-23 08:02:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:02:12,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-23 08:02:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:12,111 INFO L225 Difference]: With dead ends: 82 [2020-12-23 08:02:12,111 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 08:02:12,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:02:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 08:02:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-12-23 08:02:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 08:02:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2020-12-23 08:02:12,130 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 16 [2020-12-23 08:02:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:12,133 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2020-12-23 08:02:12,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:02:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2020-12-23 08:02:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 08:02:12,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:12,134 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:12,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 08:02:12,349 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:12,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1461153292, now seen corresponding path program 2 times [2020-12-23 08:02:12,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:12,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351847035] [2020-12-23 08:02:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:12,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:12,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167977394] [2020-12-23 08:02:12,361 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 [2020-12-23 08:02:12,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:02:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 08:02:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:14,667 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~p~0 4) (<= 1 c_ULTIMATE.start_main_~y~0) (= c_ULTIMATE.start_main_~a~0 (div c_ULTIMATE.start_main_~x~0 2)) (= (mod c_ULTIMATE.start_main_~x~0 2) 0) (= c_ULTIMATE.start_main_~b~0 (div c_ULTIMATE.start_main_~y~0 2)) (= c_ULTIMATE.start_main_~q~0 0) (<= (mod c_ULTIMATE.start_main_~y~0 2) 0) (let ((.cse0 (= (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0) (+ (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~p~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~q~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)) (and .cse0 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond))))) is different from false [2020-12-23 08:02:24,891 WARN L197 SmtUtils]: Spent 8.19 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-23 08:02:37,082 WARN L197 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-23 08:02:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351847035] [2020-12-23 08:02:37,106 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167977394] [2020-12-23 08:02:37,107 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 08:02:37,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:02:37,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 08:02:37,107 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 08:02:37,107 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:02:37,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:37,331 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 08:02:37,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:02:37 BoogieIcfgContainer [2020-12-23 08:02:37,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:02:37,332 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:02:37,332 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:02:37,332 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:02:37,333 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:35" (3/4) ... [2020-12-23 08:02:37,339 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 08:02:37,339 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:02:37,340 INFO L168 Benchmark]: Toolchain (without parser) took 62542.81 ms. Allocated memory was 175.1 MB in the beginning and 210.8 MB in the end (delta: 35.7 MB). Free memory was 150.3 MB in the beginning and 162.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:37,341 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 175.1 MB. Free memory is still 149.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:02:37,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.14 ms. Allocated memory is still 175.1 MB. Free memory was 150.3 MB in the beginning and 140.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:37,342 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.78 ms. Allocated memory is still 175.1 MB. Free memory was 140.2 MB in the beginning and 138.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:37,343 INFO L168 Benchmark]: Boogie Preprocessor took 60.01 ms. Allocated memory is still 175.1 MB. Free memory was 138.4 MB in the beginning and 137.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:37,343 INFO L168 Benchmark]: RCFGBuilder took 528.30 ms. Allocated memory is still 175.1 MB. Free memory was 137.3 MB in the beginning and 122.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:37,344 INFO L168 Benchmark]: TraceAbstraction took 61557.25 ms. Allocated memory was 175.1 MB in the beginning and 210.8 MB in the end (delta: 35.7 MB). Free memory was 121.9 MB in the beginning and 162.8 MB in the end (delta: -40.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:02:37,345 INFO L168 Benchmark]: Witness Printer took 6.98 ms. Allocated memory is still 210.8 MB. Free memory is still 162.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:02:37,353 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 175.1 MB. Free memory is still 149.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.14 ms. Allocated memory is still 175.1 MB. Free memory was 150.3 MB in the beginning and 140.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 91.78 ms. Allocated memory is still 175.1 MB. Free memory was 140.2 MB in the beginning and 138.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.01 ms. Allocated memory is still 175.1 MB. Free memory was 138.4 MB in the beginning and 137.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 528.30 ms. Allocated memory is still 175.1 MB. Free memory was 137.3 MB in the beginning and 122.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 61557.25 ms. Allocated memory was 175.1 MB in the beginning and 210.8 MB in the end (delta: 35.7 MB). Free memory was 121.9 MB in the beginning and 162.8 MB in the end (delta: -40.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 6.98 ms. Allocated memory is still 210.8 MB. Free memory is still 162.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 61.4s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 190 SDtfs, 592 SDslu, 438 SDs, 0 SdLazy, 533 SolverSat, 131 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 16.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 109 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.6s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 113 ConstructedInterpolants, 1 QuantifiedInterpolants, 13525 SizeOfPredicates, 66 NumberOfNonLiveVariables, 670 ConjunctsInSsa, 193 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 4/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...