java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:20:06,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:20:06,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:20:06,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:20:06,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:20:06,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:20:06,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:20:06,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:20:06,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:20:06,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:20:06,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:20:06,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:20:06,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:20:06,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:20:06,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:20:06,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:20:06,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:20:06,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:20:06,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:20:06,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:20:06,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:20:06,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:20:06,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:20:06,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:20:06,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-03 19:20:06,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-03 19:20:06,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-03 19:20:06,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-03 19:20:06,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-03 19:20:06,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-03 19:20:06,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 19:20:06,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 19:20:06,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 19:20:06,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 19:20:06,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 19:20:06,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 19:20:06,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 19:20:06,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 19:20:06,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:20:06,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:20:06,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:20:06,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-03 19:20:06,622 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:20:06,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:20:06,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:20:06,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:20:06,625 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:20:06,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:20:06,626 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:20:06,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:20:06,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:20:06,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:20:06,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:20:06,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:20:06,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:20:06,628 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:20:06,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:20:06,629 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:20:06,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:20:06,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:20:06,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:20:06,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:20:06,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:20:06,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:20:06,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:20:06,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:20:06,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:20:06,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:20:06,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:20:06,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:20:06,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:20:06,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:20:06,679 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:20:06,682 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:20:06,684 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:20:06,684 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:20:06,685 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2019-09-03 19:20:06,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c121e5e6/97b3b8c4bfe941c0a912a4273dd71877/FLAGbe123f485 [2019-09-03 19:20:07,293 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:20:07,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2019-09-03 19:20:07,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c121e5e6/97b3b8c4bfe941c0a912a4273dd71877/FLAGbe123f485 [2019-09-03 19:20:07,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c121e5e6/97b3b8c4bfe941c0a912a4273dd71877 [2019-09-03 19:20:07,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:20:07,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:20:07,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:20:07,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:20:07,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:20:07,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:20:07" (1/1) ... [2019-09-03 19:20:07,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b00aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:07, skipping insertion in model container [2019-09-03 19:20:07,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:20:07" (1/1) ... [2019-09-03 19:20:07,651 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:20:07,678 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:20:07,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:20:08,066 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:20:08,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:20:08,135 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:20:08,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08 WrapperNode [2019-09-03 19:20:08,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:20:08,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:20:08,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:20:08,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:20:08,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... [2019-09-03 19:20:08,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... [2019-09-03 19:20:08,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... [2019-09-03 19:20:08,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... [2019-09-03 19:20:08,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... [2019-09-03 19:20:08,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... [2019-09-03 19:20:08,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... [2019-09-03 19:20:08,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:20:08,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:20:08,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:20:08,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:20:08,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:20:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:20:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:20:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:20:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2019-09-03 19:20:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-09-03 19:20:08,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:20:08,253 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2019-09-03 19:20:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:20:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:20:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-09-03 19:20:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-09-03 19:20:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2019-09-03 19:20:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-09-03 19:20:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2019-09-03 19:20:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2019-09-03 19:20:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2019-09-03 19:20:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-09-03 19:20:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2019-09-03 19:20:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2019-09-03 19:20:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2019-09-03 19:20:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2019-09-03 19:20:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2019-09-03 19:20:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2019-09-03 19:20:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2019-09-03 19:20:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2019-09-03 19:20:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2019-09-03 19:20:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2019-09-03 19:20:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2019-09-03 19:20:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2019-09-03 19:20:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2019-09-03 19:20:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2019-09-03 19:20:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2019-09-03 19:20:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2019-09-03 19:20:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2019-09-03 19:20:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2019-09-03 19:20:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2019-09-03 19:20:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2019-09-03 19:20:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2019-09-03 19:20:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2019-09-03 19:20:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2019-09-03 19:20:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2019-09-03 19:20:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2019-09-03 19:20:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2019-09-03 19:20:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2019-09-03 19:20:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2019-09-03 19:20:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure index [2019-09-03 19:20:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2019-09-03 19:20:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2019-09-03 19:20:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2019-09-03 19:20:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2019-09-03 19:20:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2019-09-03 19:20:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2019-09-03 19:20:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2019-09-03 19:20:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2019-09-03 19:20:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2019-09-03 19:20:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2019-09-03 19:20:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 19:20:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2019-09-03 19:20:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-09-03 19:20:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 19:20:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 19:20:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:20:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 19:20:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2019-09-03 19:20:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 19:20:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:20:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:20:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-09-03 19:20:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-09-03 19:20:08,685 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:20:08,685 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-03 19:20:08,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:20:08 BoogieIcfgContainer [2019-09-03 19:20:08,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:20:08,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:20:08,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:20:08,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:20:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:20:07" (1/3) ... [2019-09-03 19:20:08,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b900d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:20:08, skipping insertion in model container [2019-09-03 19:20:08,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:08" (2/3) ... [2019-09-03 19:20:08,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b900d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:20:08, skipping insertion in model container [2019-09-03 19:20:08,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:20:08" (3/3) ... [2019-09-03 19:20:08,694 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c24.i [2019-09-03 19:20:08,704 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:20:08,710 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:20:08,727 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:20:08,757 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:20:08,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:20:08,758 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:20:08,758 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:20:08,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:20:08,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:20:08,758 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:20:08,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:20:08,758 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:20:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-09-03 19:20:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 19:20:08,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:08,781 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:08,783 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:08,789 INFO L82 PathProgramCache]: Analyzing trace with hash -581213385, now seen corresponding path program 1 times [2019-09-03 19:20:08,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:08,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:08,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:08,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:08,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:20:08,940 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:20:08,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:20:08,944 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:20:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:20:08,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:20:08,961 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2019-09-03 19:20:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:09,051 INFO L93 Difference]: Finished difference Result 123 states and 177 transitions. [2019-09-03 19:20:09,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:20:09,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-03 19:20:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:09,064 INFO L225 Difference]: With dead ends: 123 [2019-09-03 19:20:09,065 INFO L226 Difference]: Without dead ends: 69 [2019-09-03 19:20:09,069 INFO L628 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 [2019-09-03 19:20:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-03 19:20:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2019-09-03 19:20:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 19:20:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-09-03 19:20:09,119 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2019-09-03 19:20:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:09,120 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-09-03 19:20:09,120 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:20:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-09-03 19:20:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 19:20:09,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:09,122 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:09,122 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash -351648040, now seen corresponding path program 1 times [2019-09-03 19:20:09,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:09,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:09,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:09,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:09,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:20:09,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:09,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:09,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:09,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 19:20:09,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:20:09,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:09,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-03 19:20:09,349 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:20:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:20:09,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:20:09,350 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2019-09-03 19:20:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:09,478 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2019-09-03 19:20:09,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 19:20:09,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-03 19:20:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:09,492 INFO L225 Difference]: With dead ends: 131 [2019-09-03 19:20:09,493 INFO L226 Difference]: Without dead ends: 92 [2019-09-03 19:20:09,495 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:20:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-03 19:20:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2019-09-03 19:20:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-03 19:20:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2019-09-03 19:20:09,522 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2019-09-03 19:20:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:09,524 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2019-09-03 19:20:09,524 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:20:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2019-09-03 19:20:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-03 19:20:09,527 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:09,528 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:09,529 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 613250579, now seen corresponding path program 2 times [2019-09-03 19:20:09,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:09,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:09,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:09,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:09,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 19:20:09,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:09,627 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:09,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:09,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:20:09,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:09,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 19:20:09,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 19:20:09,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:20:09,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-09-03 19:20:09,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 19:20:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 19:20:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:20:09,746 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 8 states. [2019-09-03 19:20:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:10,012 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2019-09-03 19:20:10,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 19:20:10,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-09-03 19:20:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:10,015 INFO L225 Difference]: With dead ends: 259 [2019-09-03 19:20:10,016 INFO L226 Difference]: Without dead ends: 196 [2019-09-03 19:20:10,018 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:20:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-03 19:20:10,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 95. [2019-09-03 19:20:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-03 19:20:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2019-09-03 19:20:10,060 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 27 [2019-09-03 19:20:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:10,061 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2019-09-03 19:20:10,061 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 19:20:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2019-09-03 19:20:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 19:20:10,064 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:10,064 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:10,065 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1884917406, now seen corresponding path program 1 times [2019-09-03 19:20:10,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:10,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:10,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:10,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:10,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-03 19:20:10,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:10,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:10,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:10,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 19:20:10,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-03 19:20:10,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:10,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-03 19:20:10,278 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:20:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:20:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:20:10,279 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand 7 states. [2019-09-03 19:20:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:10,384 INFO L93 Difference]: Finished difference Result 228 states and 313 transitions. [2019-09-03 19:20:10,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:20:10,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-09-03 19:20:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:10,386 INFO L225 Difference]: With dead ends: 228 [2019-09-03 19:20:10,386 INFO L226 Difference]: Without dead ends: 146 [2019-09-03 19:20:10,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:20:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-03 19:20:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2019-09-03 19:20:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-03 19:20:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2019-09-03 19:20:10,403 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 43 [2019-09-03 19:20:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:10,403 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2019-09-03 19:20:10,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:20:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2019-09-03 19:20:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-03 19:20:10,406 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:10,406 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:10,407 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash 708097291, now seen corresponding path program 2 times [2019-09-03 19:20:10,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:10,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:10,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:10,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:10,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-09-03 19:20:10,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:10,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:10,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:10,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:20:10,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:10,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 19:20:10,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-09-03 19:20:10,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:10,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-03 19:20:10,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 19:20:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 19:20:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:20:10,627 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand 8 states. [2019-09-03 19:20:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:10,759 INFO L93 Difference]: Finished difference Result 272 states and 377 transitions. [2019-09-03 19:20:10,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:20:10,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2019-09-03 19:20:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:10,762 INFO L225 Difference]: With dead ends: 272 [2019-09-03 19:20:10,762 INFO L226 Difference]: Without dead ends: 169 [2019-09-03 19:20:10,763 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:20:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-03 19:20:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 141. [2019-09-03 19:20:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-03 19:20:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2019-09-03 19:20:10,779 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 50 [2019-09-03 19:20:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:10,779 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2019-09-03 19:20:10,779 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 19:20:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2019-09-03 19:20:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-03 19:20:10,782 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:10,783 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:10,783 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:10,783 INFO L82 PathProgramCache]: Analyzing trace with hash 633204730, now seen corresponding path program 3 times [2019-09-03 19:20:10,784 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:10,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:10,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:10,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:10,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-03 19:20:10,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:11,000 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:11,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:11,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 19:20:11,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:11,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 19:20:11,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:11,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-03 19:20:11,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:11,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-03 19:20:11,213 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 19:20:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 19:20:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:20:11,214 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand 15 states. [2019-09-03 19:20:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:12,326 INFO L93 Difference]: Finished difference Result 593 states and 857 transitions. [2019-09-03 19:20:12,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 19:20:12,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-09-03 19:20:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:12,330 INFO L225 Difference]: With dead ends: 593 [2019-09-03 19:20:12,331 INFO L226 Difference]: Without dead ends: 466 [2019-09-03 19:20:12,333 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 19:20:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2019-09-03 19:20:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 181. [2019-09-03 19:20:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-03 19:20:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 252 transitions. [2019-09-03 19:20:12,377 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 252 transitions. Word has length 57 [2019-09-03 19:20:12,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:12,379 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 252 transitions. [2019-09-03 19:20:12,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 19:20:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 252 transitions. [2019-09-03 19:20:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 19:20:12,391 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:12,391 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:12,391 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:12,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1421723573, now seen corresponding path program 4 times [2019-09-03 19:20:12,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:12,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:12,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:12,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:12,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-09-03 19:20:12,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:12,548 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:12,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:12,608 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:20:12,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:12,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 19:20:12,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Stream closed [2019-09-03 19:20:12,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:12,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-03 19:20:12,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 19:20:12,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 19:20:12,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:20:12,651 INFO L87 Difference]: Start difference. First operand 181 states and 252 transitions. Second operand 10 states. [2019-09-03 19:20:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:12,820 INFO L93 Difference]: Finished difference Result 428 states and 613 transitions. [2019-09-03 19:20:12,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 19:20:12,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2019-09-03 19:20:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:12,825 INFO L225 Difference]: With dead ends: 428 [2019-09-03 19:20:12,825 INFO L226 Difference]: Without dead ends: 266 [2019-09-03 19:20:12,826 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:20:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-09-03 19:20:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 204. [2019-09-03 19:20:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-09-03 19:20:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2019-09-03 19:20:12,845 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 73 [2019-09-03 19:20:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:12,846 INFO L475 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2019-09-03 19:20:12,846 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 19:20:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2019-09-03 19:20:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-03 19:20:12,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:12,848 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:12,848 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:12,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1891487876, now seen corresponding path program 5 times [2019-09-03 19:20:12,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:12,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:12,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:12,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:12,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-09-03 19:20:12,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:12,981 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:13,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:13,085 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-03 19:20:13,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:13,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 19:20:13,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-09-03 19:20:13,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:13,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-03 19:20:13,141 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 19:20:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 19:20:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:20:13,142 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 11 states. [2019-09-03 19:20:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:13,326 INFO L93 Difference]: Finished difference Result 472 states and 677 transitions. [2019-09-03 19:20:13,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 19:20:13,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2019-09-03 19:20:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:13,329 INFO L225 Difference]: With dead ends: 472 [2019-09-03 19:20:13,329 INFO L226 Difference]: Without dead ends: 289 [2019-09-03 19:20:13,330 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:20:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-09-03 19:20:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 227. [2019-09-03 19:20:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-09-03 19:20:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 318 transitions. [2019-09-03 19:20:13,350 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 318 transitions. Word has length 80 [2019-09-03 19:20:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:13,350 INFO L475 AbstractCegarLoop]: Abstraction has 227 states and 318 transitions. [2019-09-03 19:20:13,350 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 19:20:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 318 transitions. [2019-09-03 19:20:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-03 19:20:13,354 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:13,354 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:13,355 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:13,355 INFO L82 PathProgramCache]: Analyzing trace with hash 150079527, now seen corresponding path program 6 times [2019-09-03 19:20:13,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:13,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:13,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:13,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:13,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-09-03 19:20:13,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:13,484 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:13,497 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:13,557 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 19:20:13,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:13,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 19:20:13,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:13,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2019-09-03 19:20:13,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:13,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-03 19:20:13,687 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:20:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:20:13,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:20:13,688 INFO L87 Difference]: Start difference. First operand 227 states and 318 transitions. Second operand 19 states. [2019-09-03 19:20:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:15,884 INFO L93 Difference]: Finished difference Result 1063 states and 1557 transitions. [2019-09-03 19:20:15,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-03 19:20:15,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-09-03 19:20:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:15,892 INFO L225 Difference]: With dead ends: 1063 [2019-09-03 19:20:15,893 INFO L226 Difference]: Without dead ends: 856 [2019-09-03 19:20:15,895 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1267, Invalid=3289, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 19:20:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2019-09-03 19:20:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 267. [2019-09-03 19:20:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-09-03 19:20:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 378 transitions. [2019-09-03 19:20:15,935 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 378 transitions. Word has length 87 [2019-09-03 19:20:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:15,936 INFO L475 AbstractCegarLoop]: Abstraction has 267 states and 378 transitions. [2019-09-03 19:20:15,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:20:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 378 transitions. [2019-09-03 19:20:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-03 19:20:15,939 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:15,939 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:15,939 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:15,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1871912078, now seen corresponding path program 7 times [2019-09-03 19:20:15,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:15,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:15,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:15,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:15,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-09-03 19:20:16,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:16,083 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:16,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:16,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 19:20:16,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-09-03 19:20:16,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:16,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-03 19:20:16,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 19:20:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 19:20:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:20:16,205 INFO L87 Difference]: Start difference. First operand 267 states and 378 transitions. Second operand 13 states. [2019-09-03 19:20:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:16,435 INFO L93 Difference]: Finished difference Result 628 states and 913 transitions. [2019-09-03 19:20:16,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 19:20:16,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 103 [2019-09-03 19:20:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:16,438 INFO L225 Difference]: With dead ends: 628 [2019-09-03 19:20:16,439 INFO L226 Difference]: Without dead ends: 386 [2019-09-03 19:20:16,442 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:20:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-09-03 19:20:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 290. [2019-09-03 19:20:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-09-03 19:20:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 411 transitions. [2019-09-03 19:20:16,468 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 411 transitions. Word has length 103 [2019-09-03 19:20:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:16,468 INFO L475 AbstractCegarLoop]: Abstraction has 290 states and 411 transitions. [2019-09-03 19:20:16,469 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 19:20:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 411 transitions. [2019-09-03 19:20:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-03 19:20:16,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:16,472 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:16,472 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:16,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2027103113, now seen corresponding path program 8 times [2019-09-03 19:20:16,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:16,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:16,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:16,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:16,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-09-03 19:20:16,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:16,611 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:16,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:16,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:20:16,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:16,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 19:20:16,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-09-03 19:20:16,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:16,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-03 19:20:16,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 19:20:16,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 19:20:16,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:20:16,759 INFO L87 Difference]: Start difference. First operand 290 states and 411 transitions. Second operand 14 states. [2019-09-03 19:20:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:17,054 INFO L93 Difference]: Finished difference Result 672 states and 977 transitions. [2019-09-03 19:20:17,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 19:20:17,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2019-09-03 19:20:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:17,057 INFO L225 Difference]: With dead ends: 672 [2019-09-03 19:20:17,057 INFO L226 Difference]: Without dead ends: 409 [2019-09-03 19:20:17,059 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:20:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2019-09-03 19:20:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 313. [2019-09-03 19:20:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-09-03 19:20:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 444 transitions. [2019-09-03 19:20:17,088 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 444 transitions. Word has length 110 [2019-09-03 19:20:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:17,089 INFO L475 AbstractCegarLoop]: Abstraction has 313 states and 444 transitions. [2019-09-03 19:20:17,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 19:20:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 444 transitions. [2019-09-03 19:20:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-03 19:20:17,091 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:17,091 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:17,091 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:17,092 INFO L82 PathProgramCache]: Analyzing trace with hash -615956018, now seen corresponding path program 9 times [2019-09-03 19:20:17,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:17,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:17,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:17,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:17,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2019-09-03 19:20:17,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:17,269 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:17,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:20:17,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 19:20:17,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:17,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-03 19:20:17,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:17,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-09-03 19:20:17,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:17,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-09-03 19:20:17,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 19:20:17,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 19:20:17,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:20:17,561 INFO L87 Difference]: Start difference. First operand 313 states and 444 transitions. Second operand 23 states. [2019-09-03 19:20:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:21,512 INFO L93 Difference]: Finished difference Result 1653 states and 2437 transitions. [2019-09-03 19:20:21,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-03 19:20:21,513 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2019-09-03 19:20:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:21,521 INFO L225 Difference]: With dead ends: 1653 [2019-09-03 19:20:21,521 INFO L226 Difference]: Without dead ends: 1366 [2019-09-03 19:20:21,527 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2771, Invalid=7129, Unknown=0, NotChecked=0, Total=9900 [2019-09-03 19:20:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2019-09-03 19:20:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 353. [2019-09-03 19:20:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-09-03 19:20:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 504 transitions. [2019-09-03 19:20:21,572 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 504 transitions. Word has length 117 [2019-09-03 19:20:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:21,607 INFO L475 AbstractCegarLoop]: Abstraction has 353 states and 504 transitions. [2019-09-03 19:20:21,607 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 19:20:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 504 transitions. [2019-09-03 19:20:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-03 19:20:21,609 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:21,609 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:21,610 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:21,610 INFO L82 PathProgramCache]: Analyzing trace with hash -780097697, now seen corresponding path program 10 times [2019-09-03 19:20:21,610 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:21,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:21,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:21,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:21,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-09-03 19:20:21,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:21,815 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:21,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:20:21,899 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:20:21,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:21,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 19:20:21,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-09-03 19:20:21,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:21,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-03 19:20:21,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 19:20:21,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 19:20:21,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:20:21,965 INFO L87 Difference]: Start difference. First operand 353 states and 504 transitions. Second operand 16 states. [2019-09-03 19:20:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:22,310 INFO L93 Difference]: Finished difference Result 828 states and 1213 transitions. [2019-09-03 19:20:22,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 19:20:22,310 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 133 [2019-09-03 19:20:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:22,315 INFO L225 Difference]: With dead ends: 828 [2019-09-03 19:20:22,316 INFO L226 Difference]: Without dead ends: 506 [2019-09-03 19:20:22,317 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:20:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-09-03 19:20:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 376. [2019-09-03 19:20:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-09-03 19:20:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 537 transitions. [2019-09-03 19:20:22,347 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 537 transitions. Word has length 133 [2019-09-03 19:20:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:22,348 INFO L475 AbstractCegarLoop]: Abstraction has 376 states and 537 transitions. [2019-09-03 19:20:22,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 19:20:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 537 transitions. [2019-09-03 19:20:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-03 19:20:22,351 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:22,351 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:22,351 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash 994619440, now seen corresponding path program 11 times [2019-09-03 19:20:22,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:22,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:22,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:22,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:22,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2019-09-03 19:20:22,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:22,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:22,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:20:22,670 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-03 19:20:22,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:22,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 19:20:22,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:20:22,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:22,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-03 19:20:22,730 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 19:20:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 19:20:22,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:20:22,731 INFO L87 Difference]: Start difference. First operand 376 states and 537 transitions. Second operand 17 states. [2019-09-03 19:20:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:23,085 INFO L93 Difference]: Finished difference Result 872 states and 1277 transitions. [2019-09-03 19:20:23,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 19:20:23,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 140 [2019-09-03 19:20:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:23,089 INFO L225 Difference]: With dead ends: 872 [2019-09-03 19:20:23,089 INFO L226 Difference]: Without dead ends: 529 [2019-09-03 19:20:23,090 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:20:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2019-09-03 19:20:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 399. [2019-09-03 19:20:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2019-09-03 19:20:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 570 transitions. [2019-09-03 19:20:23,125 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 570 transitions. Word has length 140 [2019-09-03 19:20:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:23,126 INFO L475 AbstractCegarLoop]: Abstraction has 399 states and 570 transitions. [2019-09-03 19:20:23,126 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 19:20:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 570 transitions. [2019-09-03 19:20:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-03 19:20:23,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:23,129 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:23,129 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -885869509, now seen corresponding path program 12 times [2019-09-03 19:20:23,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:23,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:23,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:23,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:23,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2019-09-03 19:20:23,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:23,362 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:23,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:20:23,568 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-03 19:20:23,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:23,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 19:20:23,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:23,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 52 proven. 80 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2019-09-03 19:20:23,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:23,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2019-09-03 19:20:23,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 19:20:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 19:20:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-09-03 19:20:23,774 INFO L87 Difference]: Start difference. First operand 399 states and 570 transitions. Second operand 27 states. [2019-09-03 19:20:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:30,036 INFO L93 Difference]: Finished difference Result 2363 states and 3497 transitions. [2019-09-03 19:20:30,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2019-09-03 19:20:30,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 147 [2019-09-03 19:20:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:30,047 INFO L225 Difference]: With dead ends: 2363 [2019-09-03 19:20:30,048 INFO L226 Difference]: Without dead ends: 1996 [2019-09-03 19:20:30,055 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6608 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5283, Invalid=13623, Unknown=0, NotChecked=0, Total=18906 [2019-09-03 19:20:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-09-03 19:20:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 439. [2019-09-03 19:20:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2019-09-03 19:20:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 630 transitions. [2019-09-03 19:20:30,119 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 630 transitions. Word has length 147 [2019-09-03 19:20:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:30,119 INFO L475 AbstractCegarLoop]: Abstraction has 439 states and 630 transitions. [2019-09-03 19:20:30,119 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 19:20:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 630 transitions. [2019-09-03 19:20:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-03 19:20:30,124 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:30,124 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:30,124 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1611539014, now seen corresponding path program 13 times [2019-09-03 19:20:30,125 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:30,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:30,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:30,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:30,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-09-03 19:20:30,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:30,330 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:30,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:30,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 19:20:30,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-09-03 19:20:30,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:30,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-03 19:20:30,455 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:20:30,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:20:30,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:20:30,456 INFO L87 Difference]: Start difference. First operand 439 states and 630 transitions. Second operand 19 states. [2019-09-03 19:20:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:30,969 INFO L93 Difference]: Finished difference Result 1028 states and 1513 transitions. [2019-09-03 19:20:30,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 19:20:30,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 163 [2019-09-03 19:20:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:30,976 INFO L225 Difference]: With dead ends: 1028 [2019-09-03 19:20:30,977 INFO L226 Difference]: Without dead ends: 626 [2019-09-03 19:20:30,978 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:20:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-09-03 19:20:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 462. [2019-09-03 19:20:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-09-03 19:20:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 663 transitions. [2019-09-03 19:20:31,021 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 663 transitions. Word has length 163 [2019-09-03 19:20:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:31,022 INFO L475 AbstractCegarLoop]: Abstraction has 462 states and 663 transitions. [2019-09-03 19:20:31,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:20:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 663 transitions. [2019-09-03 19:20:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-03 19:20:31,025 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:31,025 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:31,025 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash -323900957, now seen corresponding path program 14 times [2019-09-03 19:20:31,026 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:31,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:31,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:31,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:31,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2019-09-03 19:20:31,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:31,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:31,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:20:31,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:20:31,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:31,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 19:20:31,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2019-09-03 19:20:31,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:31,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-03 19:20:31,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 19:20:31,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 19:20:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:20:31,399 INFO L87 Difference]: Start difference. First operand 462 states and 663 transitions. Second operand 20 states. [2019-09-03 19:20:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:31,838 INFO L93 Difference]: Finished difference Result 1072 states and 1577 transitions. [2019-09-03 19:20:31,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 19:20:31,839 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 170 [2019-09-03 19:20:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:31,843 INFO L225 Difference]: With dead ends: 1072 [2019-09-03 19:20:31,843 INFO L226 Difference]: Without dead ends: 649 [2019-09-03 19:20:31,845 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:20:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-09-03 19:20:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 485. [2019-09-03 19:20:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2019-09-03 19:20:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 696 transitions. [2019-09-03 19:20:31,891 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 696 transitions. Word has length 170 [2019-09-03 19:20:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:31,892 INFO L475 AbstractCegarLoop]: Abstraction has 485 states and 696 transitions. [2019-09-03 19:20:31,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 19:20:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 696 transitions. [2019-09-03 19:20:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-03 19:20:31,895 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:31,895 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:31,896 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:31,896 INFO L82 PathProgramCache]: Analyzing trace with hash 956759458, now seen corresponding path program 15 times [2019-09-03 19:20:31,896 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:31,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:31,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:31,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:31,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2019-09-03 19:20:32,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:32,108 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:32,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:20:32,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-03 19:20:32,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:32,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 19:20:32,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:32,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 80 proven. 114 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-09-03 19:20:32,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:32,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2019-09-03 19:20:32,435 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 19:20:32,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 19:20:32,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:20:32,436 INFO L87 Difference]: Start difference. First operand 485 states and 696 transitions. Second operand 31 states. [2019-09-03 19:20:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:41,753 INFO L93 Difference]: Finished difference Result 3193 states and 4737 transitions. [2019-09-03 19:20:41,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2019-09-03 19:20:41,753 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2019-09-03 19:20:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:41,768 INFO L225 Difference]: With dead ends: 3193 [2019-09-03 19:20:41,769 INFO L226 Difference]: Without dead ends: 2746 [2019-09-03 19:20:41,778 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12576 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9163, Invalid=23779, Unknown=0, NotChecked=0, Total=32942 [2019-09-03 19:20:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2019-09-03 19:20:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 525. [2019-09-03 19:20:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2019-09-03 19:20:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 756 transitions. [2019-09-03 19:20:41,855 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 756 transitions. Word has length 177 [2019-09-03 19:20:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:41,855 INFO L475 AbstractCegarLoop]: Abstraction has 525 states and 756 transitions. [2019-09-03 19:20:41,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 19:20:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 756 transitions. [2019-09-03 19:20:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-03 19:20:41,859 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:41,859 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:41,859 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:41,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1706143859, now seen corresponding path program 16 times [2019-09-03 19:20:41,860 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:41,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:41,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:41,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:41,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2019-09-03 19:20:42,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:42,175 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:42,197 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:42,288 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:20:42,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:42,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-03 19:20:42,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2019-09-03 19:20:42,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:42,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-03 19:20:42,338 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 19:20:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 19:20:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-03 19:20:42,339 INFO L87 Difference]: Start difference. First operand 525 states and 756 transitions. Second operand 22 states. [2019-09-03 19:20:42,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:42,837 INFO L93 Difference]: Finished difference Result 1228 states and 1813 transitions. [2019-09-03 19:20:42,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 19:20:42,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 193 [2019-09-03 19:20:42,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:42,843 INFO L225 Difference]: With dead ends: 1228 [2019-09-03 19:20:42,843 INFO L226 Difference]: Without dead ends: 746 [2019-09-03 19:20:42,845 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-03 19:20:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2019-09-03 19:20:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 548. [2019-09-03 19:20:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2019-09-03 19:20:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 789 transitions. [2019-09-03 19:20:42,910 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 789 transitions. Word has length 193 [2019-09-03 19:20:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:42,911 INFO L475 AbstractCegarLoop]: Abstraction has 548 states and 789 transitions. [2019-09-03 19:20:42,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 19:20:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 789 transitions. [2019-09-03 19:20:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-09-03 19:20:42,915 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:42,915 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:42,915 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2130450980, now seen corresponding path program 17 times [2019-09-03 19:20:42,916 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:42,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:42,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:42,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:42,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2019-09-03 19:20:43,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:43,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:43,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:20:43,705 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-03 19:20:43,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:43,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 19:20:43,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 0 proven. 982 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2019-09-03 19:20:43,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:43,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-03 19:20:43,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 19:20:43,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 19:20:43,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:20:43,785 INFO L87 Difference]: Start difference. First operand 548 states and 789 transitions. Second operand 23 states. [2019-09-03 19:20:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:44,290 INFO L93 Difference]: Finished difference Result 1272 states and 1877 transitions. [2019-09-03 19:20:44,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 19:20:44,290 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2019-09-03 19:20:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:44,295 INFO L225 Difference]: With dead ends: 1272 [2019-09-03 19:20:44,295 INFO L226 Difference]: Without dead ends: 769 [2019-09-03 19:20:44,297 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:20:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2019-09-03 19:20:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 571. [2019-09-03 19:20:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2019-09-03 19:20:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 822 transitions. [2019-09-03 19:20:44,360 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 822 transitions. Word has length 200 [2019-09-03 19:20:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:44,360 INFO L475 AbstractCegarLoop]: Abstraction has 571 states and 822 transitions. [2019-09-03 19:20:44,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 19:20:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 822 transitions. [2019-09-03 19:20:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-03 19:20:44,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:44,363 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:44,363 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 791312975, now seen corresponding path program 18 times [2019-09-03 19:20:44,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:44,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:44,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:44,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:44,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-09-03 19:20:44,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:44,743 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:20:44,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:45,204 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-03 19:20:45,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:45,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 19:20:45,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:45,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 114 proven. 154 refuted. 0 times theorem prover too weak. 1357 trivial. 0 not checked. [2019-09-03 19:20:45,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:45,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 35 [2019-09-03 19:20:45,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 19:20:45,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 19:20:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:20:45,457 INFO L87 Difference]: Start difference. First operand 571 states and 822 transitions. Second operand 35 states. [2019-09-03 19:20:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:59,462 INFO L93 Difference]: Finished difference Result 4143 states and 6157 transitions. [2019-09-03 19:20:59,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2019-09-03 19:20:59,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 207 [2019-09-03 19:20:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:59,476 INFO L225 Difference]: With dead ends: 4143 [2019-09-03 19:20:59,476 INFO L226 Difference]: Without dead ends: 3616 [2019-09-03 19:20:59,483 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21896 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=14825, Invalid=38767, Unknown=0, NotChecked=0, Total=53592 [2019-09-03 19:20:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2019-09-03 19:20:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 611. [2019-09-03 19:20:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2019-09-03 19:20:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 882 transitions. [2019-09-03 19:20:59,586 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 882 transitions. Word has length 207 [2019-09-03 19:20:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:59,586 INFO L475 AbstractCegarLoop]: Abstraction has 611 states and 882 transitions. [2019-09-03 19:20:59,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 19:20:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 882 transitions. [2019-09-03 19:20:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-03 19:20:59,589 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:59,589 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:59,590 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash -347845862, now seen corresponding path program 19 times [2019-09-03 19:20:59,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:59,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:59,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:59,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:20:59,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2019-09-03 19:20:59,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:59,895 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:20:59,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:21:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:00,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 19:21:00,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2019-09-03 19:21:00,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:00,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-03 19:21:00,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 19:21:00,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 19:21:00,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-03 19:21:00,085 INFO L87 Difference]: Start difference. First operand 611 states and 882 transitions. Second operand 25 states. [2019-09-03 19:21:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:00,829 INFO L93 Difference]: Finished difference Result 1428 states and 2113 transitions. [2019-09-03 19:21:00,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 19:21:00,831 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 223 [2019-09-03 19:21:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:00,835 INFO L225 Difference]: With dead ends: 1428 [2019-09-03 19:21:00,835 INFO L226 Difference]: Without dead ends: 866 [2019-09-03 19:21:00,836 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-03 19:21:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-09-03 19:21:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 634. [2019-09-03 19:21:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-09-03 19:21:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 915 transitions. [2019-09-03 19:21:00,925 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 915 transitions. Word has length 223 [2019-09-03 19:21:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:00,925 INFO L475 AbstractCegarLoop]: Abstraction has 634 states and 915 transitions. [2019-09-03 19:21:00,925 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 19:21:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 915 transitions. [2019-09-03 19:21:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-09-03 19:21:00,929 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:00,929 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:00,929 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash 117972303, now seen corresponding path program 20 times [2019-09-03 19:21:00,930 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:00,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:00,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:00,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:21:00,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-09-03 19:21:01,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:01,234 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:01,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:21:01,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:21:01,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:01,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 19:21:01,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-09-03 19:21:01,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:01,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-03 19:21:01,408 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 19:21:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 19:21:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:21:01,409 INFO L87 Difference]: Start difference. First operand 634 states and 915 transitions. Second operand 26 states. [2019-09-03 19:21:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:02,076 INFO L93 Difference]: Finished difference Result 1472 states and 2177 transitions. [2019-09-03 19:21:02,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 19:21:02,078 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 230 [2019-09-03 19:21:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:02,082 INFO L225 Difference]: With dead ends: 1472 [2019-09-03 19:21:02,082 INFO L226 Difference]: Without dead ends: 889 [2019-09-03 19:21:02,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:21:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2019-09-03 19:21:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 657. [2019-09-03 19:21:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-09-03 19:21:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 948 transitions. [2019-09-03 19:21:02,174 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 948 transitions. Word has length 230 [2019-09-03 19:21:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:02,175 INFO L475 AbstractCegarLoop]: Abstraction has 657 states and 948 transitions. [2019-09-03 19:21:02,175 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 19:21:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 948 transitions. [2019-09-03 19:21:02,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-09-03 19:21:02,180 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:02,180 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:02,180 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1992416394, now seen corresponding path program 21 times [2019-09-03 19:21:02,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:02,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:02,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:02,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:02,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1638 trivial. 0 not checked. [2019-09-03 19:21:02,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:02,621 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:21:02,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:02,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-03 19:21:02,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:02,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-03 19:21:02,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:02,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 154 proven. 200 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2019-09-03 19:21:03,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:03,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15] total 39 [2019-09-03 19:21:03,058 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-03 19:21:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-03 19:21:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 19:21:03,059 INFO L87 Difference]: Start difference. First operand 657 states and 948 transitions. Second operand 39 states. [2019-09-03 19:21:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:23,354 INFO L93 Difference]: Finished difference Result 5213 states and 7757 transitions. [2019-09-03 19:21:23,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2019-09-03 19:21:23,354 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 237 [2019-09-03 19:21:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:23,379 INFO L225 Difference]: With dead ends: 5213 [2019-09-03 19:21:23,380 INFO L226 Difference]: Without dead ends: 4606 [2019-09-03 19:21:23,386 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35489 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=22737, Invalid=59919, Unknown=0, NotChecked=0, Total=82656 [2019-09-03 19:21:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4606 states. [2019-09-03 19:21:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4606 to 697. [2019-09-03 19:21:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-09-03 19:21:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1008 transitions. [2019-09-03 19:21:23,530 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1008 transitions. Word has length 237 [2019-09-03 19:21:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:23,532 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1008 transitions. [2019-09-03 19:21:23,532 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-03 19:21:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1008 transitions. [2019-09-03 19:21:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-09-03 19:21:23,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:23,536 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:23,536 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2003850119, now seen corresponding path program 22 times [2019-09-03 19:21:23,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:23,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:23,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:23,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:23,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2019-09-03 19:21:23,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:23,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:24,009 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:21:24,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:21:24,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:24,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-03 19:21:24,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2019-09-03 19:21:24,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:24,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-03 19:21:24,179 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 19:21:24,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 19:21:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-03 19:21:24,179 INFO L87 Difference]: Start difference. First operand 697 states and 1008 transitions. Second operand 28 states. [2019-09-03 19:21:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:25,178 INFO L93 Difference]: Finished difference Result 1628 states and 2413 transitions. [2019-09-03 19:21:25,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 19:21:25,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 253 [2019-09-03 19:21:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:25,185 INFO L225 Difference]: With dead ends: 1628 [2019-09-03 19:21:25,185 INFO L226 Difference]: Without dead ends: 986 [2019-09-03 19:21:25,187 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-03 19:21:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2019-09-03 19:21:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 720. [2019-09-03 19:21:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2019-09-03 19:21:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1041 transitions. [2019-09-03 19:21:25,332 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1041 transitions. Word has length 253 [2019-09-03 19:21:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:25,332 INFO L475 AbstractCegarLoop]: Abstraction has 720 states and 1041 transitions. [2019-09-03 19:21:25,332 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 19:21:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1041 transitions. [2019-09-03 19:21:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-09-03 19:21:25,338 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:25,338 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:25,338 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1363702152, now seen corresponding path program 23 times [2019-09-03 19:21:25,339 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:25,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:25,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:25,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:25,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2019-09-03 19:21:25,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:25,770 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:25,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:21:26,474 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-09-03 19:21:26,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:26,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 19:21:26,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2019-09-03 19:21:26,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:26,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-03 19:21:26,540 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-03 19:21:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-03 19:21:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-03 19:21:26,541 INFO L87 Difference]: Start difference. First operand 720 states and 1041 transitions. Second operand 29 states. [2019-09-03 19:21:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:27,285 INFO L93 Difference]: Finished difference Result 1672 states and 2477 transitions. [2019-09-03 19:21:27,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 19:21:27,288 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 260 [2019-09-03 19:21:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:27,294 INFO L225 Difference]: With dead ends: 1672 [2019-09-03 19:21:27,294 INFO L226 Difference]: Without dead ends: 1009 [2019-09-03 19:21:27,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-03 19:21:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2019-09-03 19:21:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 743. [2019-09-03 19:21:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2019-09-03 19:21:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1074 transitions. [2019-09-03 19:21:27,409 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1074 transitions. Word has length 260 [2019-09-03 19:21:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:27,409 INFO L475 AbstractCegarLoop]: Abstraction has 743 states and 1074 transitions. [2019-09-03 19:21:27,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-03 19:21:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1074 transitions. [2019-09-03 19:21:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-09-03 19:21:27,412 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:27,412 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:27,413 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:27,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:27,413 INFO L82 PathProgramCache]: Analyzing trace with hash 313809507, now seen corresponding path program 24 times [2019-09-03 19:21:27,413 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:27,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:27,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:27,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:27,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2111 trivial. 0 not checked. [2019-09-03 19:21:28,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:28,081 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:28,110 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:21:29,136 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 19:21:29,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:29,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 19:21:29,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:29,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 200 proven. 252 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2019-09-03 19:21:29,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:29,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16] total 43 [2019-09-03 19:21:29,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-03 19:21:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-03 19:21:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1319, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 19:21:29,510 INFO L87 Difference]: Start difference. First operand 743 states and 1074 transitions. Second operand 43 states. [2019-09-03 19:21:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:53,558 INFO L93 Difference]: Finished difference Result 6403 states and 9537 transitions. [2019-09-03 19:21:53,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2019-09-03 19:21:53,559 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 267 [2019-09-03 19:21:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:53,576 INFO L225 Difference]: With dead ends: 6403 [2019-09-03 19:21:53,576 INFO L226 Difference]: Without dead ends: 5716 [2019-09-03 19:21:53,584 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54886 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=33421, Invalid=88729, Unknown=0, NotChecked=0, Total=122150 [2019-09-03 19:21:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5716 states. [2019-09-03 19:21:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5716 to 783. [2019-09-03 19:21:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2019-09-03 19:21:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1134 transitions. [2019-09-03 19:21:53,771 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1134 transitions. Word has length 267 [2019-09-03 19:21:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:53,771 INFO L475 AbstractCegarLoop]: Abstraction has 783 states and 1134 transitions. [2019-09-03 19:21:53,771 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-03 19:21:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1134 transitions. [2019-09-03 19:21:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-09-03 19:21:53,775 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:53,775 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:53,775 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1525260818, now seen corresponding path program 25 times [2019-09-03 19:21:53,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:53,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:53,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:53,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:53,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3078 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2349 trivial. 0 not checked. [2019-09-03 19:21:54,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:54,226 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:54,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:21:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:54,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 19:21:54,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3078 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2349 trivial. 0 not checked. [2019-09-03 19:21:54,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:54,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-03 19:21:54,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 19:21:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 19:21:54,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:21:54,458 INFO L87 Difference]: Start difference. First operand 783 states and 1134 transitions. Second operand 31 states. [2019-09-03 19:21:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:55,492 INFO L93 Difference]: Finished difference Result 1828 states and 2713 transitions. [2019-09-03 19:21:55,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 19:21:55,492 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 283 [2019-09-03 19:21:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:55,497 INFO L225 Difference]: With dead ends: 1828 [2019-09-03 19:21:55,497 INFO L226 Difference]: Without dead ends: 1106 [2019-09-03 19:21:55,499 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:21:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2019-09-03 19:21:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 806. [2019-09-03 19:21:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2019-09-03 19:21:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1167 transitions. [2019-09-03 19:21:55,697 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1167 transitions. Word has length 283 [2019-09-03 19:21:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:55,697 INFO L475 AbstractCegarLoop]: Abstraction has 806 states and 1167 transitions. [2019-09-03 19:21:55,698 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 19:21:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1167 transitions. [2019-09-03 19:21:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-09-03 19:21:55,702 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:55,702 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:55,703 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2005584197, now seen corresponding path program 26 times [2019-09-03 19:21:55,703 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:55,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:55,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:55,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:21:55,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3278 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2494 trivial. 0 not checked. [2019-09-03 19:21:56,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:56,171 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:56,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:21:56,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:21:56,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:56,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 19:21:56,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3278 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2494 trivial. 0 not checked. [2019-09-03 19:21:56,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:56,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-03 19:21:56,380 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-03 19:21:56,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-03 19:21:56,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-03 19:21:56,381 INFO L87 Difference]: Start difference. First operand 806 states and 1167 transitions. Second operand 32 states. [2019-09-03 19:21:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:57,395 INFO L93 Difference]: Finished difference Result 1872 states and 2777 transitions. [2019-09-03 19:21:57,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 19:21:57,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 290 [2019-09-03 19:21:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:57,402 INFO L225 Difference]: With dead ends: 1872 [2019-09-03 19:21:57,402 INFO L226 Difference]: Without dead ends: 1129 [2019-09-03 19:21:57,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-03 19:21:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2019-09-03 19:21:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 829. [2019-09-03 19:21:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 829 states. [2019-09-03 19:21:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1200 transitions. [2019-09-03 19:21:57,568 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1200 transitions. Word has length 290 [2019-09-03 19:21:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:57,569 INFO L475 AbstractCegarLoop]: Abstraction has 829 states and 1200 transitions. [2019-09-03 19:21:57,569 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-03 19:21:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1200 transitions. [2019-09-03 19:21:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-09-03 19:21:57,572 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:57,572 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:57,573 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1657425078, now seen corresponding path program 27 times [2019-09-03 19:21:57,573 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:57,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:57,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:57,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:57,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3485 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2644 trivial. 0 not checked. [2019-09-03 19:21:58,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:58,220 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:58,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:21:58,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-03 19:21:58,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:58,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-03 19:21:58,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:58,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3485 backedges. 252 proven. 310 refuted. 0 times theorem prover too weak. 2923 trivial. 0 not checked. [2019-09-03 19:21:58,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:58,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2019-09-03 19:21:58,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-03 19:21:58,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-03 19:21:58,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1572, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:21:58,833 INFO L87 Difference]: Start difference. First operand 829 states and 1200 transitions. Second operand 47 states. [2019-09-03 19:22:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:22:32,470 INFO L93 Difference]: Finished difference Result 7713 states and 11497 transitions. [2019-09-03 19:22:32,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 375 states. [2019-09-03 19:22:32,470 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 297 [2019-09-03 19:22:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:22:32,484 INFO L225 Difference]: With dead ends: 7713 [2019-09-03 19:22:32,484 INFO L226 Difference]: Without dead ends: 6946 [2019-09-03 19:22:32,496 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81558 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=47453, Invalid=126853, Unknown=0, NotChecked=0, Total=174306 [2019-09-03 19:22:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6946 states. [2019-09-03 19:22:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6946 to 869. [2019-09-03 19:22:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 869 states. [2019-09-03 19:22:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1260 transitions. [2019-09-03 19:22:32,749 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1260 transitions. Word has length 297 [2019-09-03 19:22:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:22:32,749 INFO L475 AbstractCegarLoop]: Abstraction has 869 states and 1260 transitions. [2019-09-03 19:22:32,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-03 19:22:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1260 transitions. [2019-09-03 19:22:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2019-09-03 19:22:32,753 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:22:32,754 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:22:32,754 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:22:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:22:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash -262696805, now seen corresponding path program 28 times [2019-09-03 19:22:32,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:22:32,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:22:32,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:32,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:22:32,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:22:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3810 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2910 trivial. 0 not checked. [2019-09-03 19:22:33,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:22:33,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:22:33,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:22:33,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:22:33,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:22:33,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-03 19:22:33,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:22:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3810 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2910 trivial. 0 not checked. [2019-09-03 19:22:33,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:22:33,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-09-03 19:22:33,538 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 19:22:33,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 19:22:33,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 19:22:33,539 INFO L87 Difference]: Start difference. First operand 869 states and 1260 transitions. Second operand 34 states. [2019-09-03 19:22:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:22:34,698 INFO L93 Difference]: Finished difference Result 2028 states and 3013 transitions. [2019-09-03 19:22:34,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-03 19:22:34,699 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 313 [2019-09-03 19:22:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:22:34,703 INFO L225 Difference]: With dead ends: 2028 [2019-09-03 19:22:34,703 INFO L226 Difference]: Without dead ends: 1226 [2019-09-03 19:22:34,705 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 19:22:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2019-09-03 19:22:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 892. [2019-09-03 19:22:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2019-09-03 19:22:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1293 transitions. [2019-09-03 19:22:34,925 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1293 transitions. Word has length 313 [2019-09-03 19:22:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:22:34,926 INFO L475 AbstractCegarLoop]: Abstraction has 892 states and 1293 transitions. [2019-09-03 19:22:34,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 19:22:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1293 transitions. [2019-09-03 19:22:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-09-03 19:22:34,930 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:22:34,930 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:22:34,930 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:22:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:22:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash -194030796, now seen corresponding path program 29 times [2019-09-03 19:22:34,931 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:22:34,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:22:34,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:34,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:22:34,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:22:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 3071 trivial. 0 not checked. [2019-09-03 19:22:35,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:22:35,517 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:22:35,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:22:37,551 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2019-09-03 19:22:37,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:22:37,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 19:22:37,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:22:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 3071 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (32)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:22:37,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:22:37,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-09-03 19:22:37,639 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 19:22:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 19:22:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:22:37,639 INFO L87 Difference]: Start difference. First operand 892 states and 1293 transitions. Second operand 35 states. [2019-09-03 19:22:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:22:38,795 INFO L93 Difference]: Finished difference Result 2072 states and 3077 transitions. [2019-09-03 19:22:38,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 19:22:38,795 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 320 [2019-09-03 19:22:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:22:38,799 INFO L225 Difference]: With dead ends: 2072 [2019-09-03 19:22:38,799 INFO L226 Difference]: Without dead ends: 1249 [2019-09-03 19:22:38,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:22:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2019-09-03 19:22:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 915. [2019-09-03 19:22:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 915 states. [2019-09-03 19:22:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1326 transitions. [2019-09-03 19:22:39,034 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1326 transitions. Word has length 320 [2019-09-03 19:22:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:22:39,034 INFO L475 AbstractCegarLoop]: Abstraction has 915 states and 1326 transitions. [2019-09-03 19:22:39,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 19:22:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1326 transitions. [2019-09-03 19:22:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-09-03 19:22:39,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:22:39,038 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:22:39,039 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:22:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:22:39,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1303073911, now seen corresponding path program 30 times [2019-09-03 19:22:39,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:22:39,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:22:39,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:39,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:22:39,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:22:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 3237 trivial. 0 not checked. [2019-09-03 19:22:39,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:22:39,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:22:39,625 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:22:40,991 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-09-03 19:22:40,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:22:40,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 19:22:40,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:22:41,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:22:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 404 proven. 280 refuted. 0 times theorem prover too weak. 3577 trivial. 0 not checked. [2019-09-03 19:22:41,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:22:41,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 16] total 49 [2019-09-03 19:22:41,419 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-03 19:22:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-03 19:22:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1674, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 19:22:41,420 INFO L87 Difference]: Start difference. First operand 915 states and 1326 transitions. Second operand 49 states. [2019-09-03 19:23:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:23:20,663 INFO L93 Difference]: Finished difference Result 9143 states and 13637 transitions. [2019-09-03 19:23:20,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 444 states. [2019-09-03 19:23:20,663 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 327 [2019-09-03 19:23:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:23:20,677 INFO L225 Difference]: With dead ends: 9143 [2019-09-03 19:23:20,677 INFO L226 Difference]: Without dead ends: 8296 [2019-09-03 19:23:20,690 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 685 SyntacticMatches, 3 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104694 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=56395, Invalid=151085, Unknown=0, NotChecked=0, Total=207480 [2019-09-03 19:23:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8296 states. [2019-09-03 19:23:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8296 to 955. [2019-09-03 19:23:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2019-09-03 19:23:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1386 transitions. [2019-09-03 19:23:21,010 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1386 transitions. Word has length 327 [2019-09-03 19:23:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:23:21,010 INFO L475 AbstractCegarLoop]: Abstraction has 955 states and 1386 transitions. [2019-09-03 19:23:21,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-03 19:23:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1386 transitions. [2019-09-03 19:23:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-09-03 19:23:21,014 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:23:21,015 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:23:21,015 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:23:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:23:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash 126573250, now seen corresponding path program 31 times [2019-09-03 19:23:21,015 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:23:21,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:23:21,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:23:21,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:23:21,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:23:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:23:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 3531 trivial. 0 not checked. [2019-09-03 19:23:21,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:23:21,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:23:21,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:23:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:23:21,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 19:23:21,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:23:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 3531 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (34)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:23:21,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:23:21,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-03 19:23:21,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-03 19:23:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-03 19:23:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 19:23:21,998 INFO L87 Difference]: Start difference. First operand 955 states and 1386 transitions. Second operand 37 states. [2019-09-03 19:23:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:23:23,089 INFO L93 Difference]: Finished difference Result 2228 states and 3313 transitions. [2019-09-03 19:23:23,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 19:23:23,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 343 [2019-09-03 19:23:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:23:23,093 INFO L225 Difference]: With dead ends: 2228 [2019-09-03 19:23:23,093 INFO L226 Difference]: Without dead ends: 1346 [2019-09-03 19:23:23,095 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 19:23:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2019-09-03 19:23:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 978. [2019-09-03 19:23:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2019-09-03 19:23:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1419 transitions. [2019-09-03 19:23:23,291 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1419 transitions. Word has length 343 [2019-09-03 19:23:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:23:23,291 INFO L475 AbstractCegarLoop]: Abstraction has 978 states and 1419 transitions. [2019-09-03 19:23:23,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-03 19:23:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1419 transitions. [2019-09-03 19:23:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2019-09-03 19:23:23,296 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:23:23,296 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:23:23,296 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:23:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:23:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1228797479, now seen corresponding path program 32 times [2019-09-03 19:23:23,297 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:23:23,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:23:23,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:23:23,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:23:23,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:23:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:23:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4864 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 3708 trivial. 0 not checked. [2019-09-03 19:23:24,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:23:24,029 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:23:24,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:23:24,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:23:24,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:23:24,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 19:23:24,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:23:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4864 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 3708 trivial. 0 not checked. [2019-09-03 19:23:24,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:23:24,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-09-03 19:23:24,342 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-03 19:23:24,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-03 19:23:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 19:23:24,343 INFO L87 Difference]: Start difference. First operand 978 states and 1419 transitions. Second operand 38 states. [2019-09-03 19:23:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:23:25,868 INFO L93 Difference]: Finished difference Result 2272 states and 3377 transitions. [2019-09-03 19:23:25,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-03 19:23:25,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 350 [2019-09-03 19:23:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:23:25,872 INFO L225 Difference]: With dead ends: 2272 [2019-09-03 19:23:25,872 INFO L226 Difference]: Without dead ends: 1369 [2019-09-03 19:23:25,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 19:23:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2019-09-03 19:23:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1001. [2019-09-03 19:23:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2019-09-03 19:23:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1452 transitions. [2019-09-03 19:23:26,062 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1452 transitions. Word has length 350 [2019-09-03 19:23:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:23:26,062 INFO L475 AbstractCegarLoop]: Abstraction has 1001 states and 1452 transitions. [2019-09-03 19:23:26,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-03 19:23:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1452 transitions. [2019-09-03 19:23:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-09-03 19:23:26,065 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:23:26,066 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:23:26,066 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:23:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:23:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1832168734, now seen corresponding path program 33 times [2019-09-03 19:23:26,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:23:26,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:23:26,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:23:26,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:23:26,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:23:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:23:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5115 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3890 trivial. 0 not checked. [2019-09-03 19:23:26,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:23:26,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:23:26,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:23:27,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-09-03 19:23:27,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:23:27,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-03 19:23:27,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:23:27,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:23:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5115 backedges. 477 proven. 341 refuted. 0 times theorem prover too weak. 4297 trivial. 0 not checked. [2019-09-03 19:23:27,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:23:27,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 17] total 53 [2019-09-03 19:23:27,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-03 19:23:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-03 19:23:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=1957, Unknown=0, NotChecked=0, Total=2756 [2019-09-03 19:23:27,561 INFO L87 Difference]: Start difference. First operand 1001 states and 1452 transitions. Second operand 53 states. [2019-09-03 19:24:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:24:21,213 INFO L93 Difference]: Finished difference Result 10693 states and 15957 transitions. [2019-09-03 19:24:21,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 520 states. [2019-09-03 19:24:21,214 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 357 [2019-09-03 19:24:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:24:21,226 INFO L225 Difference]: With dead ends: 10693 [2019-09-03 19:24:21,226 INFO L226 Difference]: Without dead ends: 9766 [2019-09-03 19:24:21,236 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 723 SyntacticMatches, 64 SemanticMatches, 531 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168313 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=76713, Invalid=206843, Unknown=0, NotChecked=0, Total=283556 [2019-09-03 19:24:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9766 states. [2019-09-03 19:24:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9766 to 1041. [2019-09-03 19:24:21,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1041 states. [2019-09-03 19:24:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1512 transitions. [2019-09-03 19:24:21,698 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1512 transitions. Word has length 357 [2019-09-03 19:24:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:24:21,699 INFO L475 AbstractCegarLoop]: Abstraction has 1041 states and 1512 transitions. [2019-09-03 19:24:21,699 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-03 19:24:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1512 transitions. [2019-09-03 19:24:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2019-09-03 19:24:21,705 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:24:21,705 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:24:21,706 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:24:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:24:21,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1946314671, now seen corresponding path program 34 times [2019-09-03 19:24:21,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:24:21,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:24:21,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:21,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:24:21,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 4212 trivial. 0 not checked. [2019-09-03 19:24:22,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:24:22,467 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:24:22,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:24:22,660 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:24:22,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:24:22,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-03 19:24:22,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:24:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 4212 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (37)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:24:22,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:24:22,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-09-03 19:24:22,795 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-03 19:24:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-03 19:24:22,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 19:24:22,797 INFO L87 Difference]: Start difference. First operand 1041 states and 1512 transitions. Second operand 40 states. [2019-09-03 19:24:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:24:24,153 INFO L93 Difference]: Finished difference Result 2428 states and 3613 transitions. [2019-09-03 19:24:24,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-03 19:24:24,153 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 373 [2019-09-03 19:24:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:24:24,156 INFO L225 Difference]: With dead ends: 2428 [2019-09-03 19:24:24,156 INFO L226 Difference]: Without dead ends: 1466 [2019-09-03 19:24:24,158 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 19:24:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2019-09-03 19:24:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1064. [2019-09-03 19:24:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2019-09-03 19:24:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1545 transitions. [2019-09-03 19:24:24,520 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1545 transitions. Word has length 373 [2019-09-03 19:24:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:24:24,520 INFO L475 AbstractCegarLoop]: Abstraction has 1064 states and 1545 transitions. [2019-09-03 19:24:24,521 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-03 19:24:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1545 transitions. [2019-09-03 19:24:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2019-09-03 19:24:24,525 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:24:24,525 INFO L399 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:24:24,526 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:24:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:24:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1272023776, now seen corresponding path program 35 times [2019-09-03 19:24:24,526 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:24:24,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:24:24,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:24,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:24:24,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5774 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 4405 trivial. 0 not checked. [2019-09-03 19:24:25,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:24:25,342 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:24:25,353 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:24:27,302 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2019-09-03 19:24:27,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:24:27,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-03 19:24:27,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:24:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5774 backedges. 0 proven. 3799 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2019-09-03 19:24:27,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:24:27,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-09-03 19:24:27,506 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-03 19:24:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-03 19:24:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 19:24:27,508 INFO L87 Difference]: Start difference. First operand 1064 states and 1545 transitions. Second operand 41 states. [2019-09-03 19:24:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:24:29,245 INFO L93 Difference]: Finished difference Result 2472 states and 3677 transitions. [2019-09-03 19:24:29,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-03 19:24:29,246 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 380 [2019-09-03 19:24:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:24:29,248 INFO L225 Difference]: With dead ends: 2472 [2019-09-03 19:24:29,249 INFO L226 Difference]: Without dead ends: 1489 [2019-09-03 19:24:29,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 19:24:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2019-09-03 19:24:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1087. [2019-09-03 19:24:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2019-09-03 19:24:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1578 transitions. [2019-09-03 19:24:29,458 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1578 transitions. Word has length 380 [2019-09-03 19:24:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:24:29,459 INFO L475 AbstractCegarLoop]: Abstraction has 1087 states and 1578 transitions. [2019-09-03 19:24:29,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-03 19:24:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1578 transitions. [2019-09-03 19:24:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-09-03 19:24:29,462 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:24:29,463 INFO L399 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:24:29,463 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:24:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:24:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1846908789, now seen corresponding path program 36 times [2019-09-03 19:24:29,463 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:24:29,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:24:29,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:29,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:24:29,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6047 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 4603 trivial. 0 not checked. [2019-09-03 19:24:30,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:24:30,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:24:30,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:24:33,769 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-09-03 19:24:33,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:24:33,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 19:24:33,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:24:34,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:24:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6047 backedges. 556 proven. 408 refuted. 0 times theorem prover too weak. 5083 trivial. 0 not checked. [2019-09-03 19:24:34,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:24:34,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 18] total 57 [2019-09-03 19:24:34,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-03 19:24:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-03 19:24:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2262, Unknown=0, NotChecked=0, Total=3192 [2019-09-03 19:24:34,316 INFO L87 Difference]: Start difference. First operand 1087 states and 1578 transitions. Second operand 57 states. [2019-09-03 19:25:29,131 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2019-09-03 19:25:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:25:45,521 INFO L93 Difference]: Finished difference Result 12363 states and 18457 transitions. [2019-09-03 19:25:45,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 602 states. [2019-09-03 19:25:45,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 387 [2019-09-03 19:25:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:25:45,534 INFO L225 Difference]: With dead ends: 12363 [2019-09-03 19:25:45,534 INFO L226 Difference]: Without dead ends: 11356 [2019-09-03 19:25:45,548 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 825 SyntacticMatches, 67 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228803 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=102059, Invalid=276781, Unknown=0, NotChecked=0, Total=378840 [2019-09-03 19:25:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11356 states. [2019-09-03 19:25:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11356 to 1127. [2019-09-03 19:25:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2019-09-03 19:25:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1638 transitions. [2019-09-03 19:25:45,906 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1638 transitions. Word has length 387 [2019-09-03 19:25:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:25:45,907 INFO L475 AbstractCegarLoop]: Abstraction has 1127 states and 1638 transitions. [2019-09-03 19:25:45,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-03 19:25:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1638 transitions. [2019-09-03 19:25:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2019-09-03 19:25:45,910 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:25:45,910 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:25:45,910 INFO L418 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:25:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:25:45,910 INFO L82 PathProgramCache]: Analyzing trace with hash 866795926, now seen corresponding path program 37 times [2019-09-03 19:25:45,911 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:25:45,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:25:45,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:25:45,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:25:45,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:25:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:25:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6474 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 4953 trivial. 0 not checked. [2019-09-03 19:25:46,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:25:46,699 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:25:46,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:25:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:25:46,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-03 19:25:46,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:25:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6474 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 4953 trivial. 0 not checked. [2019-09-03 19:25:47,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:25:47,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-09-03 19:25:47,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-03 19:25:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-03 19:25:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 19:25:47,123 INFO L87 Difference]: Start difference. First operand 1127 states and 1638 transitions. Second operand 43 states. [2019-09-03 19:25:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:25:48,552 INFO L93 Difference]: Finished difference Result 2628 states and 3913 transitions. [2019-09-03 19:25:48,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-03 19:25:48,553 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 403 [2019-09-03 19:25:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:25:48,555 INFO L225 Difference]: With dead ends: 2628 [2019-09-03 19:25:48,556 INFO L226 Difference]: Without dead ends: 1586 [2019-09-03 19:25:48,557 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 19:25:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2019-09-03 19:25:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1150. [2019-09-03 19:25:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2019-09-03 19:25:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1671 transitions. [2019-09-03 19:25:48,808 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1671 transitions. Word has length 403 [2019-09-03 19:25:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:25:48,808 INFO L475 AbstractCegarLoop]: Abstraction has 1150 states and 1671 transitions. [2019-09-03 19:25:48,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-03 19:25:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1671 transitions. [2019-09-03 19:25:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2019-09-03 19:25:48,811 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:25:48,811 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:25:48,812 INFO L418 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:25:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:25:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1739021203, now seen corresponding path program 38 times [2019-09-03 19:25:48,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:25:48,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:25:48,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:25:48,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:25:48,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:25:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:25:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6762 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 5162 trivial. 0 not checked. [2019-09-03 19:25:49,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:25:49,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:25:49,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:25:49,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:25:49,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:25:49,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-03 19:25:49,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:25:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6762 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 5162 trivial. 0 not checked. [2019-09-03 19:25:49,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:25:49,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-09-03 19:25:49,987 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-03 19:25:49,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-03 19:25:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 19:25:49,988 INFO L87 Difference]: Start difference. First operand 1150 states and 1671 transitions. Second operand 44 states. [2019-09-03 19:25:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:25:51,470 INFO L93 Difference]: Finished difference Result 2672 states and 3977 transitions. [2019-09-03 19:25:51,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-03 19:25:51,470 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 410 [2019-09-03 19:25:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:25:51,474 INFO L225 Difference]: With dead ends: 2672 [2019-09-03 19:25:51,474 INFO L226 Difference]: Without dead ends: 1609 [2019-09-03 19:25:51,476 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 19:25:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2019-09-03 19:25:51,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1173. [2019-09-03 19:25:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2019-09-03 19:25:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1704 transitions. [2019-09-03 19:25:51,740 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1704 transitions. Word has length 410 [2019-09-03 19:25:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:25:51,740 INFO L475 AbstractCegarLoop]: Abstraction has 1173 states and 1704 transitions. [2019-09-03 19:25:51,740 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-03 19:25:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1704 transitions. [2019-09-03 19:25:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2019-09-03 19:25:51,744 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:25:51,744 INFO L399 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:25:51,744 INFO L418 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:25:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:25:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1199435534, now seen corresponding path program 39 times [2019-09-03 19:25:51,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:25:51,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:25:51,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:25:51,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:25:51,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:25:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:25:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 5376 trivial. 0 not checked. [2019-09-03 19:25:52,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:25:52,563 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:25:52,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:25:53,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-03 19:25:53,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:25:53,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-03 19:25:53,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:25:53,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:25:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 520 proven. 602 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2019-09-03 19:25:53,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:25:53,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 21] total 63 [2019-09-03 19:25:53,886 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-03 19:25:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-03 19:25:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1102, Invalid=2804, Unknown=0, NotChecked=0, Total=3906 [2019-09-03 19:25:53,887 INFO L87 Difference]: Start difference. First operand 1173 states and 1704 transitions. Second operand 63 states. [2019-09-03 19:27:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:27:24,703 INFO L93 Difference]: Finished difference Result 14153 states and 21137 transitions. [2019-09-03 19:27:24,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 691 states. [2019-09-03 19:27:24,704 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 417 [2019-09-03 19:27:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:27:24,720 INFO L225 Difference]: With dead ends: 14153 [2019-09-03 19:27:24,720 INFO L226 Difference]: Without dead ends: 13066 [2019-09-03 19:27:24,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295069 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=150471, Invalid=411279, Unknown=0, NotChecked=0, Total=561750 [2019-09-03 19:27:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2019-09-03 19:27:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 1213. [2019-09-03 19:27:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2019-09-03 19:27:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1764 transitions. [2019-09-03 19:27:25,091 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1764 transitions. Word has length 417 [2019-09-03 19:27:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:27:25,092 INFO L475 AbstractCegarLoop]: Abstraction has 1213 states and 1764 transitions. [2019-09-03 19:27:25,092 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-03 19:27:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1764 transitions. [2019-09-03 19:27:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-09-03 19:27:25,095 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:27:25,096 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:27:25,096 INFO L418 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:27:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:27:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1074518211, now seen corresponding path program 40 times [2019-09-03 19:27:25,096 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:27:25,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:27:25,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:25,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:27:25,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:27:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7518 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5754 trivial. 0 not checked. [2019-09-03 19:27:26,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:27:26,044 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:27:26,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:27:26,267 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:27:26,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:27:26,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-03 19:27:26,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:27:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7518 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5754 trivial. 0 not checked. [2019-09-03 19:27:26,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:27:26,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-09-03 19:27:26,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-03 19:27:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-03 19:27:26,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 19:27:26,352 INFO L87 Difference]: Start difference. First operand 1213 states and 1764 transitions. Second operand 46 states. [2019-09-03 19:27:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:27:28,266 INFO L93 Difference]: Finished difference Result 2828 states and 4213 transitions. [2019-09-03 19:27:28,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-03 19:27:28,266 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 433 [2019-09-03 19:27:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:27:28,270 INFO L225 Difference]: With dead ends: 2828 [2019-09-03 19:27:28,270 INFO L226 Difference]: Without dead ends: 1706 [2019-09-03 19:27:28,273 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 19:27:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2019-09-03 19:27:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1236. [2019-09-03 19:27:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2019-09-03 19:27:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1797 transitions. [2019-09-03 19:27:28,614 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1797 transitions. Word has length 433 [2019-09-03 19:27:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:27:28,614 INFO L475 AbstractCegarLoop]: Abstraction has 1236 states and 1797 transitions. [2019-09-03 19:27:28,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-03 19:27:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1797 transitions. [2019-09-03 19:27:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2019-09-03 19:27:28,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:27:28,618 INFO L399 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:27:28,618 INFO L418 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:27:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:27:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash 835197068, now seen corresponding path program 41 times [2019-09-03 19:27:28,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:27:28,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:27:28,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:28,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:27:28,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:27:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7828 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 5979 trivial. 0 not checked. [2019-09-03 19:27:29,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:27:29,495 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:27:29,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:27:33,526 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2019-09-03 19:27:33,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:27:33,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-03 19:27:33,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:27:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7828 backedges. 0 proven. 5146 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2019-09-03 19:27:33,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:27:33,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-09-03 19:27:33,650 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-03 19:27:33,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-03 19:27:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:27:33,651 INFO L87 Difference]: Start difference. First operand 1236 states and 1797 transitions. Second operand 47 states. [2019-09-03 19:27:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:27:35,414 INFO L93 Difference]: Finished difference Result 2872 states and 4277 transitions. [2019-09-03 19:27:35,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-03 19:27:35,414 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 440 [2019-09-03 19:27:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:27:35,418 INFO L225 Difference]: With dead ends: 2872 [2019-09-03 19:27:35,418 INFO L226 Difference]: Without dead ends: 1729 [2019-09-03 19:27:35,421 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:27:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2019-09-03 19:27:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1259. [2019-09-03 19:27:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1259 states. [2019-09-03 19:27:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1830 transitions. [2019-09-03 19:27:35,794 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1830 transitions. Word has length 440 [2019-09-03 19:27:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:27:35,795 INFO L475 AbstractCegarLoop]: Abstraction has 1259 states and 1830 transitions. [2019-09-03 19:27:35,795 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-03 19:27:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1830 transitions. [2019-09-03 19:27:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2019-09-03 19:27:35,799 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:27:35,799 INFO L399 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:27:35,799 INFO L418 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:27:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:27:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1263310495, now seen corresponding path program 42 times [2019-09-03 19:27:35,800 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:27:35,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:27:35,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:35,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:27:35,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:27:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8145 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 6209 trivial. 0 not checked. [2019-09-03 19:27:36,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:27:36,747 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:27:36,760 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:27:42,963 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-03 19:27:42,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:27:42,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 19:27:42,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:27:43,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:27:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8145 backedges. 602 proven. 690 refuted. 0 times theorem prover too weak. 6853 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (45)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:27:43,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:27:43,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 22] total 67 [2019-09-03 19:27:43,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-03 19:27:43,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-03 19:27:43,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=3167, Unknown=0, NotChecked=0, Total=4422 [2019-09-03 19:27:43,688 INFO L87 Difference]: Start difference. First operand 1259 states and 1830 transitions. Second operand 67 states. [2019-09-03 19:29:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:29:42,326 INFO L93 Difference]: Finished difference Result 16063 states and 23997 transitions. [2019-09-03 19:29:42,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 785 states. [2019-09-03 19:29:42,327 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 447 [2019-09-03 19:29:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:29:42,346 INFO L225 Difference]: With dead ends: 16063 [2019-09-03 19:29:42,346 INFO L226 Difference]: Without dead ends: 14896 [2019-09-03 19:29:42,371 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1274 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 846 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382919 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=191773, Invalid=526483, Unknown=0, NotChecked=0, Total=718256 [2019-09-03 19:29:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14896 states. [2019-09-03 19:29:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14896 to 1299. [2019-09-03 19:29:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1299 states. [2019-09-03 19:29:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1890 transitions. [2019-09-03 19:29:43,030 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1890 transitions. Word has length 447 [2019-09-03 19:29:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:29:43,030 INFO L475 AbstractCegarLoop]: Abstraction has 1299 states and 1890 transitions. [2019-09-03 19:29:43,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-03 19:29:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1890 transitions. [2019-09-03 19:29:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2019-09-03 19:29:43,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:29:43,034 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:29:43,035 INFO L418 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:29:43,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:29:43,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1854270870, now seen corresponding path program 43 times [2019-09-03 19:29:43,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:29:43,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:29:43,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:43,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:29:43,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:29:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8640 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 6615 trivial. 0 not checked. [2019-09-03 19:29:44,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:29:44,009 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:29:44,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:29:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:29:44,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 19:29:44,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:29:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8640 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 6615 trivial. 0 not checked. [2019-09-03 19:29:44,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:29:44,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-09-03 19:29:44,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-03 19:29:44,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-03 19:29:44,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 19:29:44,326 INFO L87 Difference]: Start difference. First operand 1299 states and 1890 transitions. Second operand 49 states. [2019-09-03 19:29:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:29:46,452 INFO L93 Difference]: Finished difference Result 3028 states and 4513 transitions. [2019-09-03 19:29:46,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-03 19:29:46,452 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 463 [2019-09-03 19:29:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:29:46,456 INFO L225 Difference]: With dead ends: 3028 [2019-09-03 19:29:46,456 INFO L226 Difference]: Without dead ends: 1826 [2019-09-03 19:29:46,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 19:29:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2019-09-03 19:29:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1322. [2019-09-03 19:29:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2019-09-03 19:29:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1923 transitions. [2019-09-03 19:29:46,874 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1923 transitions. Word has length 463 [2019-09-03 19:29:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:29:46,874 INFO L475 AbstractCegarLoop]: Abstraction has 1322 states and 1923 transitions. [2019-09-03 19:29:46,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-03 19:29:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1923 transitions. [2019-09-03 19:29:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2019-09-03 19:29:46,879 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:29:46,879 INFO L399 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:29:46,879 INFO L418 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:29:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:29:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1744201471, now seen corresponding path program 44 times [2019-09-03 19:29:46,879 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:29:46,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:29:46,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:46,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:29:46,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:29:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8972 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 6856 trivial. 0 not checked. [2019-09-03 19:29:47,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:29:47,927 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:29:47,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:29:48,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:29:48,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:29:48,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-03 19:29:48,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:29:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8972 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 6856 trivial. 0 not checked. [2019-09-03 19:29:48,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:29:48,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2019-09-03 19:29:48,255 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-03 19:29:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-03 19:29:48,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 19:29:48,256 INFO L87 Difference]: Start difference. First operand 1322 states and 1923 transitions. Second operand 50 states. [2019-09-03 19:29:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:29:50,236 INFO L93 Difference]: Finished difference Result 3072 states and 4577 transitions. [2019-09-03 19:29:50,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-03 19:29:50,236 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 470 [2019-09-03 19:29:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:29:50,240 INFO L225 Difference]: With dead ends: 3072 [2019-09-03 19:29:50,240 INFO L226 Difference]: Without dead ends: 1849 [2019-09-03 19:29:50,243 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 19:29:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2019-09-03 19:29:50,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1345. [2019-09-03 19:29:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-09-03 19:29:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1956 transitions. [2019-09-03 19:29:50,681 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1956 transitions. Word has length 470 [2019-09-03 19:29:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:29:50,681 INFO L475 AbstractCegarLoop]: Abstraction has 1345 states and 1956 transitions. [2019-09-03 19:29:50,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-03 19:29:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1956 transitions. [2019-09-03 19:29:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2019-09-03 19:29:50,686 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:29:50,686 INFO L399 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:29:50,686 INFO L418 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:29:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:29:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1520116026, now seen corresponding path program 45 times [2019-09-03 19:29:50,687 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:29:50,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:29:50,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:50,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:29:50,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:29:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9311 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 7102 trivial. 0 not checked. [2019-09-03 19:29:51,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:29:51,726 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:29:51,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:29:52,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-03 19:29:52,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:29:52,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-03 19:29:52,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:29:53,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:29:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9311 backedges. 690 proven. 784 refuted. 0 times theorem prover too weak. 7837 trivial. 0 not checked. [2019-09-03 19:29:53,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:29:53,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 23] total 71 [2019-09-03 19:29:53,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-03 19:29:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-03 19:29:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1418, Invalid=3552, Unknown=0, NotChecked=0, Total=4970 [2019-09-03 19:29:53,291 INFO L87 Difference]: Start difference. First operand 1345 states and 1956 transitions. Second operand 71 states. [2019-09-03 19:32:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:32:29,897 INFO L93 Difference]: Finished difference Result 18093 states and 27037 transitions. [2019-09-03 19:32:29,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 885 states. [2019-09-03 19:32:29,898 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 477 [2019-09-03 19:32:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:32:29,920 INFO L225 Difference]: With dead ends: 18093 [2019-09-03 19:32:29,921 INFO L226 Difference]: Without dead ends: 16846 [2019-09-03 19:32:29,952 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1407 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 950 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491779 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=241013, Invalid=664339, Unknown=0, NotChecked=0, Total=905352 [2019-09-03 19:32:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16846 states. [2019-09-03 19:32:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16846 to 1385. [2019-09-03 19:32:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2019-09-03 19:32:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2016 transitions. [2019-09-03 19:32:30,483 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2016 transitions. Word has length 477 [2019-09-03 19:32:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:32:30,484 INFO L475 AbstractCegarLoop]: Abstraction has 1385 states and 2016 transitions. [2019-09-03 19:32:30,484 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-03 19:32:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2016 transitions. [2019-09-03 19:32:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2019-09-03 19:32:30,488 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:32:30,488 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:32:30,488 INFO L418 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:32:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:32:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash 202302423, now seen corresponding path program 46 times [2019-09-03 19:32:30,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:32:30,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:32:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:30,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:32:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:32:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9840 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7536 trivial. 0 not checked. [2019-09-03 19:32:31,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:32:31,752 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:32:31,763 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:32:32,000 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:32:32,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:32:32,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 50 conjunts are in the unsatisfiable core [2019-09-03 19:32:32,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:32:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9840 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7536 trivial. 0 not checked. [2019-09-03 19:32:32,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:32:32,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2019-09-03 19:32:32,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-03 19:32:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-03 19:32:32,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 19:32:32,114 INFO L87 Difference]: Start difference. First operand 1385 states and 2016 transitions. Second operand 52 states. [2019-09-03 19:32:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:32:34,939 INFO L93 Difference]: Finished difference Result 3228 states and 4813 transitions. [2019-09-03 19:32:34,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-03 19:32:34,939 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 493 [2019-09-03 19:32:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:32:34,943 INFO L225 Difference]: With dead ends: 3228 [2019-09-03 19:32:34,943 INFO L226 Difference]: Without dead ends: 1946 [2019-09-03 19:32:34,947 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 19:32:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2019-09-03 19:32:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1408. [2019-09-03 19:32:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2019-09-03 19:32:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2049 transitions. [2019-09-03 19:32:35,412 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2049 transitions. Word has length 493 [2019-09-03 19:32:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:32:35,412 INFO L475 AbstractCegarLoop]: Abstraction has 1408 states and 2049 transitions. [2019-09-03 19:32:35,412 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-03 19:32:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2049 transitions. [2019-09-03 19:32:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2019-09-03 19:32:35,417 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:32:35,417 INFO L399 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:32:35,417 INFO L418 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:32:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:32:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash -643040200, now seen corresponding path program 47 times [2019-09-03 19:32:35,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:32:35,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:32:35,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:35,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:32:35,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:32:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10194 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7793 trivial. 0 not checked. [2019-09-03 19:32:37,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:32:37,119 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:32:37,129 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1