/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 15:00:42,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 15:00:42,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 15:00:42,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 15:00:42,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 15:00:42,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 15:00:42,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 15:00:42,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 15:00:42,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 15:00:42,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 15:00:42,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 15:00:42,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 15:00:42,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 15:00:42,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 15:00:42,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 15:00:42,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 15:00:42,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 15:00:42,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 15:00:42,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 15:00:42,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 15:00:42,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 15:00:42,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 15:00:42,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 15:00:42,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 15:00:42,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 15:00:42,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 15:00:42,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 15:00:42,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 15:00:42,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 15:00:42,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 15:00:42,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 15:00:42,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 15:00:42,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 15:00:42,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 15:00:42,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 15:00:42,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 15:00:42,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 15:00:42,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 15:00:42,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 15:00:42,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 15:00:42,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 15:00:42,245 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 15:00:42,297 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 15:00:42,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 15:00:42,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 15:00:42,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 15:00:42,300 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 15:00:42,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 15:00:42,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 15:00:42,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 15:00:42,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 15:00:42,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 15:00:42,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 15:00:42,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 15:00:42,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 15:00:42,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 15:00:42,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 15:00:42,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 15:00:42,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 15:00:42,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 15:00:42,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 15:00:42,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 15:00:42,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 15:00:42,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 15:00:42,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 15:00:42,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 15:00:42,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 15:00:42,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 15:00:42,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 15:00:42,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 15:00:42,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 15:00:42,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 15:00:42,744 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 15:00:42,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2020-12-23 15:00:42,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/694c5e662/625148b06bcd4a3abdae6bdc344fdeb8/FLAG839a3db04 [2020-12-23 15:00:43,799 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 15:00:43,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2020-12-23 15:00:43,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/694c5e662/625148b06bcd4a3abdae6bdc344fdeb8/FLAG839a3db04 [2020-12-23 15:00:44,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/694c5e662/625148b06bcd4a3abdae6bdc344fdeb8 [2020-12-23 15:00:44,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 15:00:44,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 15:00:44,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 15:00:44,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 15:00:44,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 15:00:44,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 03:00:44" (1/1) ... [2020-12-23 15:00:44,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0b1962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:44, skipping insertion in model container [2020-12-23 15:00:44,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 03:00:44" (1/1) ... [2020-12-23 15:00:44,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 15:00:44,466 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~skb,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[214],StructAccessExpression[IdentifierExpression[~skb,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~p~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp~3,] [2020-12-23 15:00:45,256 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] left hand side expression in assignment: lhs: VariableLHS[~count~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~arc_proto_map~0,GLOBAL],[IdentifierExpression[~count~0,]]] left hand side expression in assignment: lhs: VariableLHS[~count~0,] left hand side expression in assignment: lhs: VariableLHS[~arc_bcast_proto~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~arc_proto_default~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~4,] left hand side expression in assignment: lhs: VariableLHS[~lp~0,] left hand side expression in assignment: lhs: VariableLHS[~pkt~0,] left hand side expression in assignment: lhs: VariableLHS[~ofs~0,] left hand side expression in assignment: lhs: VariableLHS[~ofs~0,] left hand side expression in assignment: lhs: VariableLHS[~skb~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~dev,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[308],StructAccessExpression[IdentifierExpression[~dev,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~skb~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[32],StructAccessExpression[IdentifierExpression[~skb~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~pkt~0,] left hand side expression in assignment: lhs: VariableLHS[~__len~0,] left hand side expression in assignment: lhs: VariableLHS[~__ret~0,] left hand side expression in assignment: lhs: VariableLHS[~__ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~skb~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[134],StructAccessExpression[IdentifierExpression[~skb~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~hdr_size~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~5,] left hand side expression in assignment: lhs: VariableLHS[~pkt~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pkt~1,],base],StructAccessExpression[IdentifierExpression[~pkt~1,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pkt~1,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[1],StructAccessExpression[IdentifierExpression[~pkt~1,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pkt~1,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[1],StructAccessExpression[IdentifierExpression[~pkt~1,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp~6,] left hand side expression in assignment: lhs: VariableLHS[~lp~1,] left hand side expression in assignment: lhs: VariableLHS[~hard~0,] left hand side expression in assignment: lhs: VariableLHS[~length,] left hand side expression in assignment: lhs: VariableLHS[~length,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ofs~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[3],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ofs~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[3],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ofs~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~lp~1,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[276],StructAccessExpression[IdentifierExpression[~lp~1,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp~7,] left hand side expression in assignment: lhs: VariableLHS[~rawmode_proto_group0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~2,] left hand side expression in assignment: lhs: VariableLHS[~rawmode_proto_group1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~8,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg1~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~3,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg4~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg3~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___2~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___3~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg5~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___4~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg6~0,] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ref_cnt~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___5~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___6~0,] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~0,] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_retval_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~9,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~tmp~9,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[224],StructAccessExpression[IdentifierExpression[~tmp~9,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~tmp~9,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[232],StructAccessExpression[IdentifierExpression[~tmp~9,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp~10,] left hand side expression in assignment: lhs: VariableLHS[~set,] left hand side expression in assignment: lhs: VariableLHS[~last_index~0,GLOBAL] 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[~set_impl~0,GLOBAL],[IdentifierExpression[~last_index~0,GLOBAL]]] left hand side expression in assignment: lhs: VariableLHS[~last_index~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~deleted_index~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~deleted_index~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~set_impl~0,GLOBAL],[BinaryExpression[ARITHMINUS,IdentifierExpression[~i~1,],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~last_index~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~2,] left hand side expression in assignment: lhs: VariableLHS[~i~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp___8~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp___8~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___8~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~2,] left hand side expression in assignment: lhs: VariableLHS[~skb~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~3,] left hand side expression in assignment: lhs: VariableLHS[~skb~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~4,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~5,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~6,] [2020-12-23 15:00:45,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 15:00:45,534 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~skb,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[214],StructAccessExpression[IdentifierExpression[~skb,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~p~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp~3,] [2020-12-23 15:00:45,676 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] left hand side expression in assignment: lhs: VariableLHS[~count~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#arc_proto_map~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#arc_proto_map~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~count~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~count~0,] left hand side expression in assignment: lhs: VariableLHS[~arc_bcast_proto~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~arc_proto_default~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~4,] left hand side expression in assignment: lhs: VariableLHS[~lp~0,] left hand side expression in assignment: lhs: VariableLHS[~pkt~0,] left hand side expression in assignment: lhs: VariableLHS[~ofs~0,] left hand side expression in assignment: lhs: VariableLHS[~ofs~0,] left hand side expression in assignment: lhs: VariableLHS[~skb~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~dev,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[308],StructAccessExpression[IdentifierExpression[~dev,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~skb~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[32],StructAccessExpression[IdentifierExpression[~skb~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~pkt~0,] left hand side expression in assignment: lhs: VariableLHS[~__len~0,] left hand side expression in assignment: lhs: VariableLHS[~__ret~0,] left hand side expression in assignment: lhs: VariableLHS[~__ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~skb~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[134],StructAccessExpression[IdentifierExpression[~skb~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~hdr_size~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~5,] left hand side expression in assignment: lhs: VariableLHS[~pkt~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pkt~1,],base],StructAccessExpression[IdentifierExpression[~pkt~1,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pkt~1,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[1],StructAccessExpression[IdentifierExpression[~pkt~1,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pkt~1,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[1],StructAccessExpression[IdentifierExpression[~pkt~1,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp~6,] left hand side expression in assignment: lhs: VariableLHS[~lp~1,] left hand side expression in assignment: lhs: VariableLHS[~hard~0,] left hand side expression in assignment: lhs: VariableLHS[~length,] left hand side expression in assignment: lhs: VariableLHS[~length,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ofs~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[3],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ofs~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[3],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ofs~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~hard~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[2],StructAccessExpression[IdentifierExpression[~hard~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~lp~1,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[276],StructAccessExpression[IdentifierExpression[~lp~1,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp~7,] left hand side expression in assignment: lhs: VariableLHS[~rawmode_proto_group0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~2,] left hand side expression in assignment: lhs: VariableLHS[~rawmode_proto_group1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~8,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg1~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~3,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg4~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg3~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___2~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___3~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg5~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___4~0,] left hand side expression in assignment: lhs: VariableLHS[~ldvarg6~0,] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ref_cnt~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___5~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___6~0,] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~0,] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_retval_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_state_variable_0~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~9,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~tmp~9,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[224],StructAccessExpression[IdentifierExpression[~tmp~9,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~tmp~9,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[232],StructAccessExpression[IdentifierExpression[~tmp~9,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~tmp~10,] left hand side expression in assignment: lhs: VariableLHS[~set,] left hand side expression in assignment: lhs: VariableLHS[~last_index~0,GLOBAL] 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[~#set_impl~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#set_impl~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~last_index~0,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~last_index~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~deleted_index~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~deleted_index~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#set_impl~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#set_impl~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],BinaryExpression[ARITHMINUS,IdentifierExpression[~i~1,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~last_index~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~2,] left hand side expression in assignment: lhs: VariableLHS[~i~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp___8~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp___8~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___8~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~2,] left hand side expression in assignment: lhs: VariableLHS[~skb~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~3,] left hand side expression in assignment: lhs: VariableLHS[~skb~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~4,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~5,] left hand side expression in assignment: lhs: VariableLHS[~tmp___7~6,] [2020-12-23 15:00:45,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 15:00:45,808 INFO L208 MainTranslator]: Completed translation [2020-12-23 15:00:45,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45 WrapperNode [2020-12-23 15:00:45,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 15:00:45,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 15:00:45,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 15:00:45,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 15:00:45,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:45,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:45,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 15:00:45,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 15:00:45,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 15:00:45,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 15:00:45,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:45,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:45,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:45,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:45,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:46,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:46,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (1/1) ... [2020-12-23 15:00:46,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 15:00:46,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 15:00:46,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 15:00:46,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 15:00:46,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (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 15:00:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-23 15:00:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 15:00:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 15:00:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-23 15:00:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-23 15:00:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 15:00:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 15:00:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 15:00:46,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-23 15:00:46,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 15:00:46,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 15:00:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 15:00:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-23 15:00:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 15:00:46,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 15:00:47,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 15:00:47,484 INFO L299 CfgBuilder]: Removed 109 assume(true) statements. [2020-12-23 15:00:47,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 03:00:47 BoogieIcfgContainer [2020-12-23 15:00:47,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 15:00:47,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 15:00:47,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 15:00:47,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 15:00:47,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 03:00:44" (1/3) ... [2020-12-23 15:00:47,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601639e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 03:00:47, skipping insertion in model container [2020-12-23 15:00:47,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 03:00:45" (2/3) ... [2020-12-23 15:00:47,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601639e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 03:00:47, skipping insertion in model container [2020-12-23 15:00:47,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 03:00:47" (3/3) ... [2020-12-23 15:00:47,499 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2020-12-23 15:00:47,506 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 15:00:47,512 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 15:00:47,530 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 15:00:47,558 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 15:00:47,559 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 15:00:47,559 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 15:00:47,559 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 15:00:47,559 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 15:00:47,559 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 15:00:47,560 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 15:00:47,560 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 15:00:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-12-23 15:00:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 15:00:47,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:47,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:47,587 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash -695882203, now seen corresponding path program 1 times [2020-12-23 15:00:47,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:47,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770906441] [2020-12-23 15:00:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:47,958 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 15:00:47,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770906441] [2020-12-23 15:00:47,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:47,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 15:00:47,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010112775] [2020-12-23 15:00:47,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 15:00:47,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 15:00:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 15:00:47,983 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 3 states. [2020-12-23 15:00:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:48,079 INFO L93 Difference]: Finished difference Result 268 states and 399 transitions. [2020-12-23 15:00:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 15:00:48,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 15:00:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:48,103 INFO L225 Difference]: With dead ends: 268 [2020-12-23 15:00:48,103 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 15:00:48,108 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 15:00:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 15:00:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-12-23 15:00:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 15:00:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2020-12-23 15:00:48,185 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 18 [2020-12-23 15:00:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:48,186 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2020-12-23 15:00:48,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 15:00:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2020-12-23 15:00:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 15:00:48,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:48,189 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 15:00:48,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 15:00:48,189 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1963993750, now seen corresponding path program 1 times [2020-12-23 15:00:48,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:48,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023610149] [2020-12-23 15:00:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 15:00:48,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023610149] [2020-12-23 15:00:48,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:48,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 15:00:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579447090] [2020-12-23 15:00:48,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 15:00:48,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 15:00:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 15:00:48,397 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand 3 states. [2020-12-23 15:00:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:48,472 INFO L93 Difference]: Finished difference Result 344 states and 482 transitions. [2020-12-23 15:00:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 15:00:48,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 15:00:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:48,479 INFO L225 Difference]: With dead ends: 344 [2020-12-23 15:00:48,479 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 15:00:48,481 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 15:00:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 15:00:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2020-12-23 15:00:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-23 15:00:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 313 transitions. [2020-12-23 15:00:48,514 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 313 transitions. Word has length 19 [2020-12-23 15:00:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:48,515 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 313 transitions. [2020-12-23 15:00:48,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 15:00:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 313 transitions. [2020-12-23 15:00:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 15:00:48,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:48,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:48,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 15:00:48,518 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash 717727145, now seen corresponding path program 1 times [2020-12-23 15:00:48,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:48,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610009905] [2020-12-23 15:00:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 15:00:48,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610009905] [2020-12-23 15:00:48,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:48,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 15:00:48,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057843052] [2020-12-23 15:00:48,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 15:00:48,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 15:00:48,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 15:00:48,645 INFO L87 Difference]: Start difference. First operand 225 states and 313 transitions. Second operand 3 states. [2020-12-23 15:00:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:48,682 INFO L93 Difference]: Finished difference Result 443 states and 619 transitions. [2020-12-23 15:00:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 15:00:48,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 15:00:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:48,687 INFO L225 Difference]: With dead ends: 443 [2020-12-23 15:00:48,687 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 15:00:48,691 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 15:00:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 15:00:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-12-23 15:00:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-23 15:00:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 314 transitions. [2020-12-23 15:00:48,710 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 314 transitions. Word has length 25 [2020-12-23 15:00:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:48,711 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 314 transitions. [2020-12-23 15:00:48,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 15:00:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 314 transitions. [2020-12-23 15:00:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 15:00:48,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:48,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:48,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 15:00:48,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash 693730722, now seen corresponding path program 1 times [2020-12-23 15:00:48,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:48,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523904433] [2020-12-23 15:00:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 15:00:48,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523904433] [2020-12-23 15:00:48,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607055909] [2020-12-23 15:00:48,776 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 15:00:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:48,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 15:00:48,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 15:00:49,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:00:49,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 15:00:49,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402643644] [2020-12-23 15:00:49,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 15:00:49,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 15:00:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 15:00:49,040 INFO L87 Difference]: Start difference. First operand 226 states and 314 transitions. Second operand 5 states. [2020-12-23 15:00:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:49,070 INFO L93 Difference]: Finished difference Result 448 states and 625 transitions. [2020-12-23 15:00:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 15:00:49,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-23 15:00:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:49,073 INFO L225 Difference]: With dead ends: 448 [2020-12-23 15:00:49,073 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 15:00:49,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 15:00:49,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 15:00:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-12-23 15:00:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-23 15:00:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 319 transitions. [2020-12-23 15:00:49,087 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 319 transitions. Word has length 29 [2020-12-23 15:00:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:49,088 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 319 transitions. [2020-12-23 15:00:49,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 15:00:49,088 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 319 transitions. [2020-12-23 15:00:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 15:00:49,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:49,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 15:00:49,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:00:49,304 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1524412699, now seen corresponding path program 2 times [2020-12-23 15:00:49,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:49,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649329826] [2020-12-23 15:00:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 15:00:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649329826] [2020-12-23 15:00:49,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:49,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 15:00:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131966368] [2020-12-23 15:00:49,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 15:00:49,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 15:00:49,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 15:00:49,375 INFO L87 Difference]: Start difference. First operand 230 states and 319 transitions. Second operand 4 states. [2020-12-23 15:00:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:49,414 INFO L93 Difference]: Finished difference Result 448 states and 623 transitions. [2020-12-23 15:00:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 15:00:49,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-12-23 15:00:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:49,417 INFO L225 Difference]: With dead ends: 448 [2020-12-23 15:00:49,417 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 15:00:49,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 15:00:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 15:00:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2020-12-23 15:00:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 15:00:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 315 transitions. [2020-12-23 15:00:49,435 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 315 transitions. Word has length 33 [2020-12-23 15:00:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:49,436 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 315 transitions. [2020-12-23 15:00:49,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 15:00:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 315 transitions. [2020-12-23 15:00:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 15:00:49,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:49,447 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:49,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 15:00:49,448 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1936677014, now seen corresponding path program 1 times [2020-12-23 15:00:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:49,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58086520] [2020-12-23 15:00:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 15:00:49,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58086520] [2020-12-23 15:00:49,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:49,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 15:00:49,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305833191] [2020-12-23 15:00:49,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 15:00:49,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 15:00:49,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 15:00:49,617 INFO L87 Difference]: Start difference. First operand 229 states and 315 transitions. Second operand 5 states. [2020-12-23 15:00:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:49,698 INFO L93 Difference]: Finished difference Result 663 states and 918 transitions. [2020-12-23 15:00:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 15:00:49,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-23 15:00:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:49,701 INFO L225 Difference]: With dead ends: 663 [2020-12-23 15:00:49,702 INFO L226 Difference]: Without dead ends: 441 [2020-12-23 15:00:49,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 15:00:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-12-23 15:00:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 433. [2020-12-23 15:00:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-12-23 15:00:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 599 transitions. [2020-12-23 15:00:49,721 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 599 transitions. Word has length 44 [2020-12-23 15:00:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:49,722 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 599 transitions. [2020-12-23 15:00:49,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 15:00:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 599 transitions. [2020-12-23 15:00:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 15:00:49,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:49,724 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:49,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 15:00:49,725 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1397398033, now seen corresponding path program 1 times [2020-12-23 15:00:49,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:49,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725774440] [2020-12-23 15:00:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 15:00:49,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725774440] [2020-12-23 15:00:49,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:49,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 15:00:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346931641] [2020-12-23 15:00:49,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 15:00:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 15:00:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 15:00:49,787 INFO L87 Difference]: Start difference. First operand 433 states and 599 transitions. Second operand 3 states. [2020-12-23 15:00:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:49,827 INFO L93 Difference]: Finished difference Result 742 states and 1025 transitions. [2020-12-23 15:00:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 15:00:49,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-23 15:00:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:49,829 INFO L225 Difference]: With dead ends: 742 [2020-12-23 15:00:49,829 INFO L226 Difference]: Without dead ends: 320 [2020-12-23 15:00:49,831 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 15:00:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-23 15:00:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 288. [2020-12-23 15:00:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 15:00:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 397 transitions. [2020-12-23 15:00:49,844 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 397 transitions. Word has length 69 [2020-12-23 15:00:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:49,844 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 397 transitions. [2020-12-23 15:00:49,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 15:00:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 397 transitions. [2020-12-23 15:00:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 15:00:49,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:49,846 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:49,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 15:00:49,846 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash -266862051, now seen corresponding path program 2 times [2020-12-23 15:00:49,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:49,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481676463] [2020-12-23 15:00:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 15:00:49,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481676463] [2020-12-23 15:00:49,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:49,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 15:00:49,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520554379] [2020-12-23 15:00:49,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 15:00:49,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:49,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 15:00:49,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 15:00:49,936 INFO L87 Difference]: Start difference. First operand 288 states and 397 transitions. Second operand 4 states. [2020-12-23 15:00:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:50,030 INFO L93 Difference]: Finished difference Result 1184 states and 1648 transitions. [2020-12-23 15:00:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 15:00:50,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-23 15:00:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:50,036 INFO L225 Difference]: With dead ends: 1184 [2020-12-23 15:00:50,036 INFO L226 Difference]: Without dead ends: 920 [2020-12-23 15:00:50,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 15:00:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-12-23 15:00:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 292. [2020-12-23 15:00:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-23 15:00:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 401 transitions. [2020-12-23 15:00:50,061 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 401 transitions. Word has length 69 [2020-12-23 15:00:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:50,062 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 401 transitions. [2020-12-23 15:00:50,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 15:00:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 401 transitions. [2020-12-23 15:00:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 15:00:50,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:50,063 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:50,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 15:00:50,064 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash 436367918, now seen corresponding path program 1 times [2020-12-23 15:00:50,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:50,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185483090] [2020-12-23 15:00:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 15:00:50,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185483090] [2020-12-23 15:00:50,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:50,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 15:00:50,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616088271] [2020-12-23 15:00:50,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 15:00:50,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 15:00:50,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 15:00:50,216 INFO L87 Difference]: Start difference. First operand 292 states and 401 transitions. Second operand 9 states. [2020-12-23 15:00:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:50,716 INFO L93 Difference]: Finished difference Result 1336 states and 1860 transitions. [2020-12-23 15:00:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 15:00:50,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-12-23 15:00:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:50,722 INFO L225 Difference]: With dead ends: 1336 [2020-12-23 15:00:50,723 INFO L226 Difference]: Without dead ends: 1068 [2020-12-23 15:00:50,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2020-12-23 15:00:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-12-23 15:00:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 296. [2020-12-23 15:00:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-12-23 15:00:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 405 transitions. [2020-12-23 15:00:50,754 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 405 transitions. Word has length 72 [2020-12-23 15:00:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:50,754 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 405 transitions. [2020-12-23 15:00:50,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 15:00:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 405 transitions. [2020-12-23 15:00:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 15:00:50,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:50,756 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:50,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 15:00:50,756 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash 224042803, now seen corresponding path program 1 times [2020-12-23 15:00:50,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:50,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936806345] [2020-12-23 15:00:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:50,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936806345] [2020-12-23 15:00:50,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903563543] [2020-12-23 15:00:50,843 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 15:00:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 15:00:51,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:51,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:00:51,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 15:00:51,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047568258] [2020-12-23 15:00:51,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 15:00:51,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:51,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 15:00:51,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 15:00:51,240 INFO L87 Difference]: Start difference. First operand 296 states and 405 transitions. Second operand 6 states. [2020-12-23 15:00:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:51,301 INFO L93 Difference]: Finished difference Result 582 states and 800 transitions. [2020-12-23 15:00:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 15:00:51,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-12-23 15:00:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:51,304 INFO L225 Difference]: With dead ends: 582 [2020-12-23 15:00:51,304 INFO L226 Difference]: Without dead ends: 310 [2020-12-23 15:00:51,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 15:00:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-23 15:00:51,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2020-12-23 15:00:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-23 15:00:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-12-23 15:00:51,330 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 74 [2020-12-23 15:00:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:51,331 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-12-23 15:00:51,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 15:00:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-12-23 15:00:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 15:00:51,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:51,332 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:51,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 15:00:51,546 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1869626458, now seen corresponding path program 2 times [2020-12-23 15:00:51,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:51,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407438224] [2020-12-23 15:00:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:51,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407438224] [2020-12-23 15:00:51,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939190226] [2020-12-23 15:00:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:00:51,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 15:00:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:00:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 15:00:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:52,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:00:52,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 15:00:52,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754705927] [2020-12-23 15:00:52,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 15:00:52,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 15:00:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 15:00:52,037 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 7 states. [2020-12-23 15:00:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:52,102 INFO L93 Difference]: Finished difference Result 598 states and 820 transitions. [2020-12-23 15:00:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 15:00:52,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-12-23 15:00:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:52,105 INFO L225 Difference]: With dead ends: 598 [2020-12-23 15:00:52,106 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 15:00:52,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 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 15:00:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 15:00:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2020-12-23 15:00:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-23 15:00:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 425 transitions. [2020-12-23 15:00:52,133 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 425 transitions. Word has length 78 [2020-12-23 15:00:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:52,133 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 425 transitions. [2020-12-23 15:00:52,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 15:00:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 425 transitions. [2020-12-23 15:00:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 15:00:52,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:52,140 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:52,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 15:00:52,355 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1704259073, now seen corresponding path program 3 times [2020-12-23 15:00:52,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:52,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872997931] [2020-12-23 15:00:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:52,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872997931] [2020-12-23 15:00:52,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586777595] [2020-12-23 15:00:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:00:52,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 15:00:52,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:00:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 15:00:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 15:00:53,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 15:00:53,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2020-12-23 15:00:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987773544] [2020-12-23 15:00:53,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 15:00:53,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 15:00:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-23 15:00:53,048 INFO L87 Difference]: Start difference. First operand 312 states and 425 transitions. Second operand 11 states. [2020-12-23 15:00:54,038 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-12-23 15:00:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:54,721 INFO L93 Difference]: Finished difference Result 1554 states and 2156 transitions. [2020-12-23 15:00:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 15:00:54,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-12-23 15:00:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:54,728 INFO L225 Difference]: With dead ends: 1554 [2020-12-23 15:00:54,728 INFO L226 Difference]: Without dead ends: 1266 [2020-12-23 15:00:54,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 15:00:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2020-12-23 15:00:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 326. [2020-12-23 15:00:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-23 15:00:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 439 transitions. [2020-12-23 15:00:54,780 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 439 transitions. Word has length 82 [2020-12-23 15:00:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:54,781 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 439 transitions. [2020-12-23 15:00:54,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 15:00:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 439 transitions. [2020-12-23 15:00:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 15:00:54,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:54,784 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:54,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:00:55,000 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:55,001 INFO L82 PathProgramCache]: Analyzing trace with hash -50304368, now seen corresponding path program 1 times [2020-12-23 15:00:55,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:55,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772302972] [2020-12-23 15:00:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 15:00:55,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772302972] [2020-12-23 15:00:55,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:55,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 15:00:55,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116240676] [2020-12-23 15:00:55,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 15:00:55,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:55,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 15:00:55,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 15:00:55,121 INFO L87 Difference]: Start difference. First operand 326 states and 439 transitions. Second operand 3 states. [2020-12-23 15:00:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:55,204 INFO L93 Difference]: Finished difference Result 769 states and 1039 transitions. [2020-12-23 15:00:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 15:00:55,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-23 15:00:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:55,208 INFO L225 Difference]: With dead ends: 769 [2020-12-23 15:00:55,208 INFO L226 Difference]: Without dead ends: 613 [2020-12-23 15:00:55,209 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 15:00:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2020-12-23 15:00:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 328. [2020-12-23 15:00:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-23 15:00:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 441 transitions. [2020-12-23 15:00:55,253 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 441 transitions. Word has length 91 [2020-12-23 15:00:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:55,253 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 441 transitions. [2020-12-23 15:00:55,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 15:00:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 441 transitions. [2020-12-23 15:00:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 15:00:55,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:55,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:55,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 15:00:55,255 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:55,256 INFO L82 PathProgramCache]: Analyzing trace with hash 701515087, now seen corresponding path program 1 times [2020-12-23 15:00:55,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:55,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229340624] [2020-12-23 15:00:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 15:00:55,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229340624] [2020-12-23 15:00:55,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:55,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 15:00:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797330495] [2020-12-23 15:00:55,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 15:00:55,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 15:00:55,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 15:00:55,379 INFO L87 Difference]: Start difference. First operand 328 states and 441 transitions. Second operand 4 states. [2020-12-23 15:00:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:55,478 INFO L93 Difference]: Finished difference Result 767 states and 1034 transitions. [2020-12-23 15:00:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 15:00:55,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-12-23 15:00:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:55,481 INFO L225 Difference]: With dead ends: 767 [2020-12-23 15:00:55,482 INFO L226 Difference]: Without dead ends: 463 [2020-12-23 15:00:55,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 15:00:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-23 15:00:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 325. [2020-12-23 15:00:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-23 15:00:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 435 transitions. [2020-12-23 15:00:55,524 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 435 transitions. Word has length 93 [2020-12-23 15:00:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:55,525 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 435 transitions. [2020-12-23 15:00:55,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 15:00:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 435 transitions. [2020-12-23 15:00:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 15:00:55,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:55,526 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:55,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 15:00:55,527 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2044373249, now seen corresponding path program 1 times [2020-12-23 15:00:55,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:55,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104479190] [2020-12-23 15:00:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:55,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104479190] [2020-12-23 15:00:55,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494239024] [2020-12-23 15:00:55,640 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 15:00:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 15:00:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:56,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:00:56,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 15:00:56,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065761183] [2020-12-23 15:00:56,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 15:00:56,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 15:00:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 15:00:56,047 INFO L87 Difference]: Start difference. First operand 325 states and 435 transitions. Second operand 8 states. [2020-12-23 15:00:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:56,136 INFO L93 Difference]: Finished difference Result 640 states and 860 transitions. [2020-12-23 15:00:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 15:00:56,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2020-12-23 15:00:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:56,139 INFO L225 Difference]: With dead ends: 640 [2020-12-23 15:00:56,139 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 15:00:56,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 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 15:00:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 15:00:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2020-12-23 15:00:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-12-23 15:00:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 445 transitions. [2020-12-23 15:00:56,185 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 445 transitions. Word has length 97 [2020-12-23 15:00:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:56,185 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 445 transitions. [2020-12-23 15:00:56,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 15:00:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 445 transitions. [2020-12-23 15:00:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 15:00:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:56,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:56,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 15:00:56,403 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash -179577352, now seen corresponding path program 2 times [2020-12-23 15:00:56,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:56,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040910618] [2020-12-23 15:00:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:56,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040910618] [2020-12-23 15:00:56,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383303055] [2020-12-23 15:00:56,532 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 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 15:00:56,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 15:00:56,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:00:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 15:00:56,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:57,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:00:57,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 15:00:57,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370543377] [2020-12-23 15:00:57,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 15:00:57,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 15:00:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 15:00:57,019 INFO L87 Difference]: Start difference. First operand 333 states and 445 transitions. Second operand 9 states. [2020-12-23 15:00:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:57,120 INFO L93 Difference]: Finished difference Result 656 states and 880 transitions. [2020-12-23 15:00:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 15:00:57,121 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 101 [2020-12-23 15:00:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:57,123 INFO L225 Difference]: With dead ends: 656 [2020-12-23 15:00:57,123 INFO L226 Difference]: Without dead ends: 347 [2020-12-23 15:00:57,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 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 15:00:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-23 15:00:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 341. [2020-12-23 15:00:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-12-23 15:00:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 455 transitions. [2020-12-23 15:00:57,165 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 455 transitions. Word has length 101 [2020-12-23 15:00:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:57,165 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 455 transitions. [2020-12-23 15:00:57,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 15:00:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 455 transitions. [2020-12-23 15:00:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 15:00:57,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:57,167 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:57,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:00:57,379 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash -814464911, now seen corresponding path program 3 times [2020-12-23 15:00:57,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:57,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807798344] [2020-12-23 15:00:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 15:00:57,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807798344] [2020-12-23 15:00:57,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105546025] [2020-12-23 15:00:57,515 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 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 15:00:57,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 15:00:57,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:00:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 15:00:57,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-23 15:00:57,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 15:00:57,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2020-12-23 15:00:57,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371719163] [2020-12-23 15:00:57,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 15:00:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 15:00:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-23 15:00:57,943 INFO L87 Difference]: Start difference. First operand 341 states and 455 transitions. Second operand 5 states. [2020-12-23 15:00:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:58,131 INFO L93 Difference]: Finished difference Result 996 states and 1337 transitions. [2020-12-23 15:00:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 15:00:58,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-12-23 15:00:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:58,136 INFO L225 Difference]: With dead ends: 996 [2020-12-23 15:00:58,136 INFO L226 Difference]: Without dead ends: 831 [2020-12-23 15:00:58,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-23 15:00:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-12-23 15:00:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 656. [2020-12-23 15:00:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-12-23 15:00:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 884 transitions. [2020-12-23 15:00:58,227 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 884 transitions. Word has length 105 [2020-12-23 15:00:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:58,228 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 884 transitions. [2020-12-23 15:00:58,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 15:00:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 884 transitions. [2020-12-23 15:00:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 15:00:58,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:58,230 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:58,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 15:00:58,445 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1140772078, now seen corresponding path program 1 times [2020-12-23 15:00:58,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:58,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059438927] [2020-12-23 15:00:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-23 15:00:58,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059438927] [2020-12-23 15:00:58,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 15:00:58,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 15:00:58,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458119771] [2020-12-23 15:00:58,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 15:00:58,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 15:00:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 15:00:58,539 INFO L87 Difference]: Start difference. First operand 656 states and 884 transitions. Second operand 4 states. [2020-12-23 15:00:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:58,735 INFO L93 Difference]: Finished difference Result 1967 states and 2657 transitions. [2020-12-23 15:00:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 15:00:58,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-12-23 15:00:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:58,743 INFO L225 Difference]: With dead ends: 1967 [2020-12-23 15:00:58,743 INFO L226 Difference]: Without dead ends: 1487 [2020-12-23 15:00:58,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 15:00:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2020-12-23 15:00:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 668. [2020-12-23 15:00:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-12-23 15:00:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 901 transitions. [2020-12-23 15:00:58,866 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 901 transitions. Word has length 107 [2020-12-23 15:00:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:58,866 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 901 transitions. [2020-12-23 15:00:58,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 15:00:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 901 transitions. [2020-12-23 15:00:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 15:00:58,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:58,869 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:58,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 15:00:58,869 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:58,870 INFO L82 PathProgramCache]: Analyzing trace with hash -59309159, now seen corresponding path program 1 times [2020-12-23 15:00:58,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:58,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465812232] [2020-12-23 15:00:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:00:59,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465812232] [2020-12-23 15:00:59,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177381139] [2020-12-23 15:00:59,051 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 15:00:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:00:59,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 15:00:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:00:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:00:59,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:00:59,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 15:00:59,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757536802] [2020-12-23 15:00:59,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 15:00:59,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:00:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 15:00:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 15:00:59,411 INFO L87 Difference]: Start difference. First operand 668 states and 901 transitions. Second operand 10 states. [2020-12-23 15:00:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:00:59,549 INFO L93 Difference]: Finished difference Result 1340 states and 1812 transitions. [2020-12-23 15:00:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 15:00:59,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-12-23 15:00:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:00:59,553 INFO L225 Difference]: With dead ends: 1340 [2020-12-23 15:00:59,553 INFO L226 Difference]: Without dead ends: 696 [2020-12-23 15:00:59,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 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 15:00:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-12-23 15:00:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 684. [2020-12-23 15:00:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2020-12-23 15:00:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 921 transitions. [2020-12-23 15:00:59,633 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 921 transitions. Word has length 109 [2020-12-23 15:00:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:00:59,633 INFO L481 AbstractCegarLoop]: Abstraction has 684 states and 921 transitions. [2020-12-23 15:00:59,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 15:00:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 921 transitions. [2020-12-23 15:00:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-23 15:00:59,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:00:59,635 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:00:59,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:00:59,849 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:00:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:00:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1970658578, now seen corresponding path program 2 times [2020-12-23 15:00:59,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:00:59,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510337598] [2020-12-23 15:00:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:00:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:00,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510337598] [2020-12-23 15:01:00,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167232389] [2020-12-23 15:01:00,067 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 15:01:00,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 15:01:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 15:01:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:00,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:00,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 15:01:00,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201668113] [2020-12-23 15:01:00,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 15:01:00,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 15:01:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 15:01:00,454 INFO L87 Difference]: Start difference. First operand 684 states and 921 transitions. Second operand 11 states. [2020-12-23 15:01:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:00,599 INFO L93 Difference]: Finished difference Result 1372 states and 1852 transitions. [2020-12-23 15:01:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 15:01:00,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 113 [2020-12-23 15:01:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:00,603 INFO L225 Difference]: With dead ends: 1372 [2020-12-23 15:01:00,603 INFO L226 Difference]: Without dead ends: 712 [2020-12-23 15:01:00,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 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 15:01:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2020-12-23 15:01:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 700. [2020-12-23 15:01:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-12-23 15:01:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 941 transitions. [2020-12-23 15:01:00,686 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 941 transitions. Word has length 113 [2020-12-23 15:01:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:00,687 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 941 transitions. [2020-12-23 15:01:00,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 15:01:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 941 transitions. [2020-12-23 15:01:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 15:01:00,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:00,689 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:00,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:00,902 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash 940134923, now seen corresponding path program 3 times [2020-12-23 15:01:00,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:00,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119224494] [2020-12-23 15:01:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:01,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119224494] [2020-12-23 15:01:01,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759435093] [2020-12-23 15:01:01,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:01,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 15:01:01,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 15:01:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-23 15:01:01,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 15:01:01,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2020-12-23 15:01:01,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249738955] [2020-12-23 15:01:01,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 15:01:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:01,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 15:01:01,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 15:01:01,496 INFO L87 Difference]: Start difference. First operand 700 states and 941 transitions. Second operand 3 states. [2020-12-23 15:01:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:01,621 INFO L93 Difference]: Finished difference Result 1770 states and 2391 transitions. [2020-12-23 15:01:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 15:01:01,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-23 15:01:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:01,627 INFO L225 Difference]: With dead ends: 1770 [2020-12-23 15:01:01,627 INFO L226 Difference]: Without dead ends: 1094 [2020-12-23 15:01:01,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 15:01:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-12-23 15:01:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 688. [2020-12-23 15:01:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-12-23 15:01:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 917 transitions. [2020-12-23 15:01:01,712 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 917 transitions. Word has length 117 [2020-12-23 15:01:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:01,712 INFO L481 AbstractCegarLoop]: Abstraction has 688 states and 917 transitions. [2020-12-23 15:01:01,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 15:01:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 917 transitions. [2020-12-23 15:01:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 15:01:01,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:01,714 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:01,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:01,930 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash 985978379, now seen corresponding path program 1 times [2020-12-23 15:01:01,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:01,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981508959] [2020-12-23 15:01:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:02,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981508959] [2020-12-23 15:01:02,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208357820] [2020-12-23 15:01:02,120 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 15:01:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:02,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:02,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 15:01:02,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387364032] [2020-12-23 15:01:02,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 15:01:02,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:02,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 15:01:02,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 15:01:02,540 INFO L87 Difference]: Start difference. First operand 688 states and 917 transitions. Second operand 12 states. [2020-12-23 15:01:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:02,708 INFO L93 Difference]: Finished difference Result 1380 states and 1844 transitions. [2020-12-23 15:01:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 15:01:02,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 117 [2020-12-23 15:01:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:02,712 INFO L225 Difference]: With dead ends: 1380 [2020-12-23 15:01:02,712 INFO L226 Difference]: Without dead ends: 716 [2020-12-23 15:01:02,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 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 15:01:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-12-23 15:01:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 704. [2020-12-23 15:01:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2020-12-23 15:01:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 937 transitions. [2020-12-23 15:01:02,802 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 937 transitions. Word has length 117 [2020-12-23 15:01:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:02,803 INFO L481 AbstractCegarLoop]: Abstraction has 704 states and 937 transitions. [2020-12-23 15:01:02,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 15:01:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 937 transitions. [2020-12-23 15:01:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 15:01:02,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:02,805 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:03,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 15:01:03,019 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash -332192124, now seen corresponding path program 2 times [2020-12-23 15:01:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:03,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44871513] [2020-12-23 15:01:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:03,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44871513] [2020-12-23 15:01:03,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95007667] [2020-12-23 15:01:03,218 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:03,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 15:01:03,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 15:01:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:03,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:03,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 15:01:03,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448873530] [2020-12-23 15:01:03,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 15:01:03,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 15:01:03,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 15:01:03,665 INFO L87 Difference]: Start difference. First operand 704 states and 937 transitions. Second operand 13 states. [2020-12-23 15:01:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:03,823 INFO L93 Difference]: Finished difference Result 1412 states and 1884 transitions. [2020-12-23 15:01:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 15:01:03,823 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-12-23 15:01:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:03,828 INFO L225 Difference]: With dead ends: 1412 [2020-12-23 15:01:03,828 INFO L226 Difference]: Without dead ends: 732 [2020-12-23 15:01:03,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 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 15:01:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-12-23 15:01:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 720. [2020-12-23 15:01:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-12-23 15:01:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 957 transitions. [2020-12-23 15:01:03,924 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 957 transitions. Word has length 121 [2020-12-23 15:01:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:03,924 INFO L481 AbstractCegarLoop]: Abstraction has 720 states and 957 transitions. [2020-12-23 15:01:03,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 15:01:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 957 transitions. [2020-12-23 15:01:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 15:01:03,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:03,926 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:04,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:04,142 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1532849539, now seen corresponding path program 3 times [2020-12-23 15:01:04,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:04,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248057807] [2020-12-23 15:01:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 15:01:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248057807] [2020-12-23 15:01:04,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882864633] [2020-12-23 15:01:04,331 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:04,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 15:01:04,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 15:01:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 15:01:04,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 15:01:04,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2020-12-23 15:01:04,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728319762] [2020-12-23 15:01:04,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 15:01:04,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 15:01:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-12-23 15:01:04,817 INFO L87 Difference]: Start difference. First operand 720 states and 957 transitions. Second operand 4 states. [2020-12-23 15:01:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:05,002 INFO L93 Difference]: Finished difference Result 1858 states and 2491 transitions. [2020-12-23 15:01:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 15:01:05,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-23 15:01:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:05,009 INFO L225 Difference]: With dead ends: 1858 [2020-12-23 15:01:05,010 INFO L226 Difference]: Without dead ends: 1162 [2020-12-23 15:01:05,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-12-23 15:01:05,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-12-23 15:01:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 724. [2020-12-23 15:01:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2020-12-23 15:01:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 961 transitions. [2020-12-23 15:01:05,101 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 961 transitions. Word has length 125 [2020-12-23 15:01:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:05,101 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 961 transitions. [2020-12-23 15:01:05,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 15:01:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 961 transitions. [2020-12-23 15:01:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 15:01:05,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:05,104 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:05,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 15:01:05,305 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:05,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:05,306 INFO L82 PathProgramCache]: Analyzing trace with hash -101611800, now seen corresponding path program 1 times [2020-12-23 15:01:05,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:05,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372918581] [2020-12-23 15:01:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 15:01:05,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372918581] [2020-12-23 15:01:05,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273386205] [2020-12-23 15:01:05,518 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:05,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 15:01:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 15:01:05,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:05,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 15:01:05,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930209475] [2020-12-23 15:01:05,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 15:01:05,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 15:01:05,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 15:01:05,990 INFO L87 Difference]: Start difference. First operand 724 states and 961 transitions. Second operand 14 states. [2020-12-23 15:01:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:06,197 INFO L93 Difference]: Finished difference Result 1452 states and 1932 transitions. [2020-12-23 15:01:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 15:01:06,198 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 126 [2020-12-23 15:01:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:06,202 INFO L225 Difference]: With dead ends: 1452 [2020-12-23 15:01:06,202 INFO L226 Difference]: Without dead ends: 752 [2020-12-23 15:01:06,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 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 15:01:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-12-23 15:01:06,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 740. [2020-12-23 15:01:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-12-23 15:01:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 981 transitions. [2020-12-23 15:01:06,298 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 981 transitions. Word has length 126 [2020-12-23 15:01:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:06,298 INFO L481 AbstractCegarLoop]: Abstraction has 740 states and 981 transitions. [2020-12-23 15:01:06,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 15:01:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 981 transitions. [2020-12-23 15:01:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 15:01:06,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:06,300 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:06,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:06,514 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1850977935, now seen corresponding path program 2 times [2020-12-23 15:01:06,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:06,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162895367] [2020-12-23 15:01:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 7 proven. 231 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 15:01:06,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162895367] [2020-12-23 15:01:06,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910389411] [2020-12-23 15:01:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:07,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 15:01:07,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 15:01:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 7 proven. 231 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 15:01:07,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:07,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 15:01:07,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423661236] [2020-12-23 15:01:07,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 15:01:07,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 15:01:07,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 15:01:07,184 INFO L87 Difference]: Start difference. First operand 740 states and 981 transitions. Second operand 15 states. [2020-12-23 15:01:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:07,375 INFO L93 Difference]: Finished difference Result 1484 states and 1972 transitions. [2020-12-23 15:01:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 15:01:07,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 130 [2020-12-23 15:01:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:07,380 INFO L225 Difference]: With dead ends: 1484 [2020-12-23 15:01:07,380 INFO L226 Difference]: Without dead ends: 768 [2020-12-23 15:01:07,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 15:01:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-12-23 15:01:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 756. [2020-12-23 15:01:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2020-12-23 15:01:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1001 transitions. [2020-12-23 15:01:07,495 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1001 transitions. Word has length 130 [2020-12-23 15:01:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:07,495 INFO L481 AbstractCegarLoop]: Abstraction has 756 states and 1001 transitions. [2020-12-23 15:01:07,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 15:01:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1001 transitions. [2020-12-23 15:01:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 15:01:07,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:07,497 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:07,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 15:01:07,712 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash 276540086, now seen corresponding path program 3 times [2020-12-23 15:01:07,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:07,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76997364] [2020-12-23 15:01:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 15:01:07,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76997364] [2020-12-23 15:01:07,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864060931] [2020-12-23 15:01:07,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:08,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 15:01:08,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:08,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 15:01:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-12-23 15:01:08,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 15:01:08,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2020-12-23 15:01:08,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109159475] [2020-12-23 15:01:08,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 15:01:08,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 15:01:08,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-23 15:01:08,416 INFO L87 Difference]: Start difference. First operand 756 states and 1001 transitions. Second operand 5 states. [2020-12-23 15:01:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:08,634 INFO L93 Difference]: Finished difference Result 2141 states and 2851 transitions. [2020-12-23 15:01:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 15:01:08,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-12-23 15:01:08,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:08,642 INFO L225 Difference]: With dead ends: 2141 [2020-12-23 15:01:08,642 INFO L226 Difference]: Without dead ends: 1409 [2020-12-23 15:01:08,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-12-23 15:01:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2020-12-23 15:01:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 760. [2020-12-23 15:01:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-12-23 15:01:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1005 transitions. [2020-12-23 15:01:08,787 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1005 transitions. Word has length 134 [2020-12-23 15:01:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:08,788 INFO L481 AbstractCegarLoop]: Abstraction has 760 states and 1005 transitions. [2020-12-23 15:01:08,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 15:01:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1005 transitions. [2020-12-23 15:01:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 15:01:08,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:08,790 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:09,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 15:01:09,004 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash -803092591, now seen corresponding path program 1 times [2020-12-23 15:01:09,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:09,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833733437] [2020-12-23 15:01:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 15:01:09,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833733437] [2020-12-23 15:01:09,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905499111] [2020-12-23 15:01:09,267 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 15:01:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 15:01:09,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:09,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 15:01:09,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069898819] [2020-12-23 15:01:09,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 15:01:09,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 15:01:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 15:01:09,726 INFO L87 Difference]: Start difference. First operand 760 states and 1005 transitions. Second operand 16 states. [2020-12-23 15:01:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:09,893 INFO L93 Difference]: Finished difference Result 1524 states and 2020 transitions. [2020-12-23 15:01:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 15:01:09,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-12-23 15:01:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:09,897 INFO L225 Difference]: With dead ends: 1524 [2020-12-23 15:01:09,897 INFO L226 Difference]: Without dead ends: 788 [2020-12-23 15:01:09,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 15:01:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-12-23 15:01:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 776. [2020-12-23 15:01:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-12-23 15:01:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1025 transitions. [2020-12-23 15:01:09,984 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1025 transitions. Word has length 135 [2020-12-23 15:01:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:09,984 INFO L481 AbstractCegarLoop]: Abstraction has 776 states and 1025 transitions. [2020-12-23 15:01:09,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 15:01:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1025 transitions. [2020-12-23 15:01:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 15:01:09,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:09,986 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:10,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 15:01:10,187 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1239135286, now seen corresponding path program 2 times [2020-12-23 15:01:10,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:10,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083081039] [2020-12-23 15:01:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 7 proven. 325 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 15:01:10,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083081039] [2020-12-23 15:01:10,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115633272] [2020-12-23 15:01:10,513 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:10,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 15:01:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 15:01:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 7 proven. 325 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 15:01:10,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:10,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 15:01:10,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585330733] [2020-12-23 15:01:10,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 15:01:10,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:10,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 15:01:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 15:01:10,940 INFO L87 Difference]: Start difference. First operand 776 states and 1025 transitions. Second operand 17 states. [2020-12-23 15:01:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:11,143 INFO L93 Difference]: Finished difference Result 1556 states and 2060 transitions. [2020-12-23 15:01:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 15:01:11,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 139 [2020-12-23 15:01:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:11,147 INFO L225 Difference]: With dead ends: 1556 [2020-12-23 15:01:11,147 INFO L226 Difference]: Without dead ends: 804 [2020-12-23 15:01:11,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 15:01:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-12-23 15:01:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 792. [2020-12-23 15:01:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-12-23 15:01:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1045 transitions. [2020-12-23 15:01:11,254 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1045 transitions. Word has length 139 [2020-12-23 15:01:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:11,254 INFO L481 AbstractCegarLoop]: Abstraction has 792 states and 1045 transitions. [2020-12-23 15:01:11,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 15:01:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1045 transitions. [2020-12-23 15:01:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 15:01:11,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:11,256 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:11,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 15:01:11,471 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash 308808579, now seen corresponding path program 3 times [2020-12-23 15:01:11,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:11,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256730123] [2020-12-23 15:01:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 15:01:11,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256730123] [2020-12-23 15:01:11,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667553635] [2020-12-23 15:01:11,753 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:12,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 15:01:12,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 15:01:12,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-12-23 15:01:12,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:12,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5] total 20 [2020-12-23 15:01:12,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747711103] [2020-12-23 15:01:12,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 15:01:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 15:01:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-23 15:01:12,638 INFO L87 Difference]: Start difference. First operand 792 states and 1045 transitions. Second operand 20 states. [2020-12-23 15:01:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:13,433 INFO L93 Difference]: Finished difference Result 2122 states and 2827 transitions. [2020-12-23 15:01:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 15:01:13,433 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 143 [2020-12-23 15:01:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:13,439 INFO L225 Difference]: With dead ends: 2122 [2020-12-23 15:01:13,439 INFO L226 Difference]: Without dead ends: 1354 [2020-12-23 15:01:13,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 15:01:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-12-23 15:01:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 812. [2020-12-23 15:01:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-23 15:01:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1069 transitions. [2020-12-23 15:01:13,559 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1069 transitions. Word has length 143 [2020-12-23 15:01:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:13,560 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1069 transitions. [2020-12-23 15:01:13,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 15:01:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1069 transitions. [2020-12-23 15:01:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 15:01:13,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:13,561 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:13,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:13,770 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -188103219, now seen corresponding path program 4 times [2020-12-23 15:01:13,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:13,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329752034] [2020-12-23 15:01:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 7 proven. 435 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 15:01:14,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329752034] [2020-12-23 15:01:14,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975155323] [2020-12-23 15:01:14,052 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:14,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 15:01:14,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 15:01:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 7 proven. 435 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 15:01:14,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:14,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 15:01:14,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018186204] [2020-12-23 15:01:14,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 15:01:14,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 15:01:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 15:01:14,716 INFO L87 Difference]: Start difference. First operand 812 states and 1069 transitions. Second operand 19 states. [2020-12-23 15:01:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:14,930 INFO L93 Difference]: Finished difference Result 1628 states and 2148 transitions. [2020-12-23 15:01:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 15:01:14,930 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 148 [2020-12-23 15:01:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:14,934 INFO L225 Difference]: With dead ends: 1628 [2020-12-23 15:01:14,934 INFO L226 Difference]: Without dead ends: 840 [2020-12-23 15:01:14,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 15:01:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-12-23 15:01:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 828. [2020-12-23 15:01:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-23 15:01:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1089 transitions. [2020-12-23 15:01:15,056 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1089 transitions. Word has length 148 [2020-12-23 15:01:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:15,057 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1089 transitions. [2020-12-23 15:01:15,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 15:01:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1089 transitions. [2020-12-23 15:01:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 15:01:15,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:15,058 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:15,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 15:01:15,272 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 140486196, now seen corresponding path program 5 times [2020-12-23 15:01:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:15,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619653962] [2020-12-23 15:01:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 15:01:15,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619653962] [2020-12-23 15:01:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290169857] [2020-12-23 15:01:15,607 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:38,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 15:01:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:38,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 15:01:38,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 15:01:38,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:38,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 15:01:38,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67909690] [2020-12-23 15:01:38,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 15:01:38,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:38,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 15:01:38,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 15:01:38,801 INFO L87 Difference]: Start difference. First operand 828 states and 1089 transitions. Second operand 20 states. [2020-12-23 15:01:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:39,041 INFO L93 Difference]: Finished difference Result 1660 states and 2188 transitions. [2020-12-23 15:01:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 15:01:39,042 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 152 [2020-12-23 15:01:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:39,045 INFO L225 Difference]: With dead ends: 1660 [2020-12-23 15:01:39,045 INFO L226 Difference]: Without dead ends: 856 [2020-12-23 15:01:39,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 15:01:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-12-23 15:01:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 844. [2020-12-23 15:01:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-23 15:01:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1109 transitions. [2020-12-23 15:01:39,148 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1109 transitions. Word has length 152 [2020-12-23 15:01:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:39,148 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1109 transitions. [2020-12-23 15:01:39,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 15:01:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1109 transitions. [2020-12-23 15:01:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 15:01:39,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:39,150 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:39,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 15:01:39,351 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:39,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1548682469, now seen corresponding path program 6 times [2020-12-23 15:01:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:39,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587275053] [2020-12-23 15:01:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 7 proven. 561 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 15:01:39,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587275053] [2020-12-23 15:01:39,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977244080] [2020-12-23 15:01:39,758 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:41,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 15:01:41,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 15:01:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-12-23 15:01:42,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:42,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2020-12-23 15:01:42,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412320372] [2020-12-23 15:01:42,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 15:01:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 15:01:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2020-12-23 15:01:42,029 INFO L87 Difference]: Start difference. First operand 844 states and 1109 transitions. Second operand 24 states. [2020-12-23 15:01:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:43,268 INFO L93 Difference]: Finished difference Result 2274 states and 3015 transitions. [2020-12-23 15:01:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 15:01:43,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 156 [2020-12-23 15:01:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:43,274 INFO L225 Difference]: With dead ends: 2274 [2020-12-23 15:01:43,275 INFO L226 Difference]: Without dead ends: 1454 [2020-12-23 15:01:43,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=588, Invalid=1392, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 15:01:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2020-12-23 15:01:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 864. [2020-12-23 15:01:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-12-23 15:01:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1133 transitions. [2020-12-23 15:01:43,394 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1133 transitions. Word has length 156 [2020-12-23 15:01:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:43,395 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 1133 transitions. [2020-12-23 15:01:43,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 15:01:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1133 transitions. [2020-12-23 15:01:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 15:01:43,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:43,396 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:43,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:43,611 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1044725959, now seen corresponding path program 7 times [2020-12-23 15:01:43,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:43,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576683174] [2020-12-23 15:01:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 15:01:44,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576683174] [2020-12-23 15:01:44,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106810499] [2020-12-23 15:01:44,006 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:44,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 15:01:44,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 15:01:44,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:44,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 15:01:44,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15697363] [2020-12-23 15:01:44,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 15:01:44,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:44,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 15:01:44,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 15:01:44,557 INFO L87 Difference]: Start difference. First operand 864 states and 1133 transitions. Second operand 22 states. [2020-12-23 15:01:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:44,806 INFO L93 Difference]: Finished difference Result 1732 states and 2276 transitions. [2020-12-23 15:01:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 15:01:44,807 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2020-12-23 15:01:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:44,810 INFO L225 Difference]: With dead ends: 1732 [2020-12-23 15:01:44,810 INFO L226 Difference]: Without dead ends: 892 [2020-12-23 15:01:44,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 15:01:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-12-23 15:01:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 880. [2020-12-23 15:01:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-12-23 15:01:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1153 transitions. [2020-12-23 15:01:44,940 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1153 transitions. Word has length 161 [2020-12-23 15:01:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:44,940 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 1153 transitions. [2020-12-23 15:01:44,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 15:01:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1153 transitions. [2020-12-23 15:01:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 15:01:44,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:44,942 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:45,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 15:01:45,158 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1433894848, now seen corresponding path program 8 times [2020-12-23 15:01:45,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:45,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331704957] [2020-12-23 15:01:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 7 proven. 703 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 15:01:45,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331704957] [2020-12-23 15:01:45,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170602217] [2020-12-23 15:01:45,586 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:45,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 15:01:45,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 15:01:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 7 proven. 703 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 15:01:46,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:46,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 15:01:46,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70158115] [2020-12-23 15:01:46,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 15:01:46,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 15:01:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 15:01:46,133 INFO L87 Difference]: Start difference. First operand 880 states and 1153 transitions. Second operand 23 states. [2020-12-23 15:01:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:46,419 INFO L93 Difference]: Finished difference Result 1764 states and 2316 transitions. [2020-12-23 15:01:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 15:01:46,419 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-12-23 15:01:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:46,423 INFO L225 Difference]: With dead ends: 1764 [2020-12-23 15:01:46,423 INFO L226 Difference]: Without dead ends: 908 [2020-12-23 15:01:46,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 15:01:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2020-12-23 15:01:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 896. [2020-12-23 15:01:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-23 15:01:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1173 transitions. [2020-12-23 15:01:46,538 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1173 transitions. Word has length 165 [2020-12-23 15:01:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:46,538 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1173 transitions. [2020-12-23 15:01:46,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 15:01:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1173 transitions. [2020-12-23 15:01:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 15:01:46,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:46,540 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:46,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:46,748 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash -82863559, now seen corresponding path program 9 times [2020-12-23 15:01:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:46,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735894948] [2020-12-23 15:01:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 7 proven. 780 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 15:01:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735894948] [2020-12-23 15:01:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430533880] [2020-12-23 15:01:47,186 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:47,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 15:01:47,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 15:01:47,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2020-12-23 15:01:48,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:48,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6] total 27 [2020-12-23 15:01:48,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387678191] [2020-12-23 15:01:48,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 15:01:48,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:48,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 15:01:48,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=438, Unknown=0, NotChecked=0, Total=702 [2020-12-23 15:01:48,145 INFO L87 Difference]: Start difference. First operand 896 states and 1173 transitions. Second operand 27 states. [2020-12-23 15:01:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:50,218 INFO L93 Difference]: Finished difference Result 2644 states and 3485 transitions. [2020-12-23 15:01:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 15:01:50,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 169 [2020-12-23 15:01:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:50,227 INFO L225 Difference]: With dead ends: 2644 [2020-12-23 15:01:50,227 INFO L226 Difference]: Without dead ends: 1772 [2020-12-23 15:01:50,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1563, Invalid=3549, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 15:01:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2020-12-23 15:01:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 916. [2020-12-23 15:01:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2020-12-23 15:01:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1197 transitions. [2020-12-23 15:01:50,383 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1197 transitions. Word has length 169 [2020-12-23 15:01:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:50,383 INFO L481 AbstractCegarLoop]: Abstraction has 916 states and 1197 transitions. [2020-12-23 15:01:50,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 15:01:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1197 transitions. [2020-12-23 15:01:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 15:01:50,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:50,385 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:50,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 15:01:50,600 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2112770453, now seen corresponding path program 10 times [2020-12-23 15:01:50,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:50,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933678851] [2020-12-23 15:01:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 7 proven. 861 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 15:01:51,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933678851] [2020-12-23 15:01:51,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161558557] [2020-12-23 15:01:51,042 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 15:01:52,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 15:01:52,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 15:01:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 15:01:52,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 15:01:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 7 proven. 861 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 15:01:52,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 15:01:52,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 15:01:52,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712740646] [2020-12-23 15:01:52,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 15:01:52,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 15:01:52,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 15:01:52,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 15:01:52,281 INFO L87 Difference]: Start difference. First operand 916 states and 1197 transitions. Second operand 25 states. [2020-12-23 15:01:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 15:01:52,544 INFO L93 Difference]: Finished difference Result 1836 states and 2404 transitions. [2020-12-23 15:01:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 15:01:52,544 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-12-23 15:01:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 15:01:52,549 INFO L225 Difference]: With dead ends: 1836 [2020-12-23 15:01:52,549 INFO L226 Difference]: Without dead ends: 944 [2020-12-23 15:01:52,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 15:01:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-12-23 15:01:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 932. [2020-12-23 15:01:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-12-23 15:01:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1217 transitions. [2020-12-23 15:01:52,676 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1217 transitions. Word has length 174 [2020-12-23 15:01:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 15:01:52,677 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 1217 transitions. [2020-12-23 15:01:52,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 15:01:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1217 transitions. [2020-12-23 15:01:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 15:01:52,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 15:01:52,678 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 15:01:52,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 15:01:52,892 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 15:01:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 15:01:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1886785732, now seen corresponding path program 11 times [2020-12-23 15:01:52,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 15:01:52,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954167615] [2020-12-23 15:01:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 15:01:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 15:01:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 15:01:53,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954167615] [2020-12-23 15:01:53,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590199409] [2020-12-23 15:01:53,412 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true