/usr/bin/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:08:43,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:08:43,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:08:43,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:08:43,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:08:43,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:08:43,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:08:43,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:08:43,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:08:43,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:08:43,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:08:43,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:08:43,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:08:43,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:08:43,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:08:43,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:08:43,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:08:43,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:08:43,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:08:43,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:08:43,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:08:43,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:08:43,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:08:43,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:08:43,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 14:08:43,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 14:08:43,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 14:08:43,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 14:08:43,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 14:08:43,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 14:08:43,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 14:08:43,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 14:08:43,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 14:08:43,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 14:08:43,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 14:08:43,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 14:08:43,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 14:08:43,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 14:08:43,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:08:43,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:08:43,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:08:43,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:08:43,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:08:43,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:08:43,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:08:43,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:08:43,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:08:43,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:08:43,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:08:43,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:08:43,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:08:43,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:08:43,626 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:08:43,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:08:43,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:08:43,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:08:43,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:08:43,627 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:08:43,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:08:43,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:08:43,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:08:43,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:08:43,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:08:43,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:08:43,629 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:08:43,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:08:43,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:08:43,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:08:43,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:08:43,963 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:08:43,964 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2020-07-07 14:08:44,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6551d21a2/3d513a04d9304337808588b38cbcd08f/FLAGfd520f4b3 [2020-07-07 14:08:44,640 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:08:44,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2020-07-07 14:08:44,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6551d21a2/3d513a04d9304337808588b38cbcd08f/FLAGfd520f4b3 [2020-07-07 14:08:44,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6551d21a2/3d513a04d9304337808588b38cbcd08f [2020-07-07 14:08:44,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:08:44,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:08:44,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:08:44,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:08:44,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:08:44,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:08:44" (1/1) ... [2020-07-07 14:08:44,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552f59d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:44, skipping insertion in model container [2020-07-07 14:08:44,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:08:44" (1/1) ... [2020-07-07 14:08:44,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:08:45,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:08:45,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:08:45,424 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:08:45,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:08:45,570 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:08:45,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45 WrapperNode [2020-07-07 14:08:45,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:08:45,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:08:45,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:08:45,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:08:45,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (1/1) ... [2020-07-07 14:08:45,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (1/1) ... [2020-07-07 14:08:45,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (1/1) ... [2020-07-07 14:08:45,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (1/1) ... [2020-07-07 14:08:45,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (1/1) ... [2020-07-07 14:08:45,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (1/1) ... [2020-07-07 14:08:45,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (1/1) ... [2020-07-07 14:08:45,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:08:45,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:08:45,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:08:45,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:08:45,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (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 [2020-07-07 14:08:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:08:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:08:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:08:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2020-07-07 14:08:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-07 14:08:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2020-07-07 14:08:45,729 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2020-07-07 14:08:45,729 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2020-07-07 14:08:45,729 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2020-07-07 14:08:45,729 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2020-07-07 14:08:45,729 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-07 14:08:45,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:08:45,730 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2020-07-07 14:08:45,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:08:45,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 14:08:45,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 14:08:45,731 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 14:08:45,731 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 14:08:45,731 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 14:08:45,731 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:08:45,732 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:08:45,732 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2020-07-07 14:08:45,732 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2020-07-07 14:08:45,732 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2020-07-07 14:08:45,732 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2020-07-07 14:08:45,733 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2020-07-07 14:08:45,733 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2020-07-07 14:08:45,733 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2020-07-07 14:08:45,733 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2020-07-07 14:08:45,733 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 14:08:45,733 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2020-07-07 14:08:45,734 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2020-07-07 14:08:45,734 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2020-07-07 14:08:45,734 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2020-07-07 14:08:45,734 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2020-07-07 14:08:45,735 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 14:08:45,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:08:45,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:08:45,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:08:46,877 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:08:46,878 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 14:08:46,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:08:46 BoogieIcfgContainer [2020-07-07 14:08:46,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:08:46,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:08:46,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:08:46,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:08:46,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:08:44" (1/3) ... [2020-07-07 14:08:46,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd91fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:08:46, skipping insertion in model container [2020-07-07 14:08:46,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:08:45" (2/3) ... [2020-07-07 14:08:46,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd91fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:08:46, skipping insertion in model container [2020-07-07 14:08:46,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:08:46" (3/3) ... [2020-07-07 14:08:46,897 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2020-07-07 14:08:46,909 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:08:46,920 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:08:46,938 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:08:46,969 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:08:46,969 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:08:46,969 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:08:46,969 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:08:46,969 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:08:46,970 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:08:46,970 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:08:46,970 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:08:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states. [2020-07-07 14:08:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-07-07 14:08:47,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:47,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:47,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1455574608, now seen corresponding path program 1 times [2020-07-07 14:08:47,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:47,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939266394] [2020-07-07 14:08:47,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:47,668 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:08:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:48,181 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:48,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939266394] [2020-07-07 14:08:48,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:48,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:08:48,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671670120] [2020-07-07 14:08:48,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:08:48,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:48,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:08:48,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:08:48,214 INFO L87 Difference]: Start difference. First operand 577 states. Second operand 14 states. [2020-07-07 14:08:48,913 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-07 14:08:49,226 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-07 14:08:49,414 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-07 14:08:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:53,317 INFO L93 Difference]: Finished difference Result 1058 states and 1321 transitions. [2020-07-07 14:08:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 14:08:53,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 228 [2020-07-07 14:08:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:53,341 INFO L225 Difference]: With dead ends: 1058 [2020-07-07 14:08:53,341 INFO L226 Difference]: Without dead ends: 581 [2020-07-07 14:08:53,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:08:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-07-07 14:08:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 553. [2020-07-07 14:08:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-07-07 14:08:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 646 transitions. [2020-07-07 14:08:53,560 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 646 transitions. Word has length 228 [2020-07-07 14:08:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:53,562 INFO L479 AbstractCegarLoop]: Abstraction has 553 states and 646 transitions. [2020-07-07 14:08:53,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:08:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 646 transitions. [2020-07-07 14:08:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-07-07 14:08:53,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:53,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:53,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:08:53,570 INFO L427 AbstractCegarLoop]: === Iteration 2 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:53,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:53,571 INFO L82 PathProgramCache]: Analyzing trace with hash 503549649, now seen corresponding path program 1 times [2020-07-07 14:08:53,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:53,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787607547] [2020-07-07 14:08:53,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:53,867 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:08:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:54,110 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:54,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787607547] [2020-07-07 14:08:54,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:54,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:08:54,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913534383] [2020-07-07 14:08:54,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:08:54,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:08:54,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:08:54,114 INFO L87 Difference]: Start difference. First operand 553 states and 646 transitions. Second operand 11 states. [2020-07-07 14:08:55,752 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-07 14:08:55,892 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-07 14:08:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:57,434 INFO L93 Difference]: Finished difference Result 982 states and 1173 transitions. [2020-07-07 14:08:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 14:08:57,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 239 [2020-07-07 14:08:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:57,442 INFO L225 Difference]: With dead ends: 982 [2020-07-07 14:08:57,443 INFO L226 Difference]: Without dead ends: 558 [2020-07-07 14:08:57,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-07-07 14:08:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-07-07 14:08:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2020-07-07 14:08:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-07-07 14:08:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 650 transitions. [2020-07-07 14:08:57,561 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 650 transitions. Word has length 239 [2020-07-07 14:08:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:57,562 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 650 transitions. [2020-07-07 14:08:57,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:08:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 650 transitions. [2020-07-07 14:08:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-07-07 14:08:57,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:57,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:57,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:08:57,569 INFO L427 AbstractCegarLoop]: === Iteration 3 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash -734642201, now seen corresponding path program 1 times [2020-07-07 14:08:57,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:57,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267446552] [2020-07-07 14:08:57,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:57,917 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:08:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 14:08:58,616 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:58,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267446552] [2020-07-07 14:08:58,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:58,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 14:08:58,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200986510] [2020-07-07 14:08:58,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 14:08:58,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:58,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 14:08:58,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:08:58,621 INFO L87 Difference]: Start difference. First operand 558 states and 650 transitions. Second operand 16 states. [2020-07-07 14:08:58,767 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-07 14:08:59,476 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-07 14:09:01,652 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-07 14:09:02,531 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-07 14:09:04,686 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-07 14:09:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:05,259 INFO L93 Difference]: Finished difference Result 1187 states and 1396 transitions. [2020-07-07 14:09:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-07 14:09:05,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 312 [2020-07-07 14:09:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:05,269 INFO L225 Difference]: With dead ends: 1187 [2020-07-07 14:09:05,269 INFO L226 Difference]: Without dead ends: 758 [2020-07-07 14:09:05,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 14:09:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-07-07 14:09:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 750. [2020-07-07 14:09:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2020-07-07 14:09:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 867 transitions. [2020-07-07 14:09:05,426 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 867 transitions. Word has length 312 [2020-07-07 14:09:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:05,427 INFO L479 AbstractCegarLoop]: Abstraction has 750 states and 867 transitions. [2020-07-07 14:09:05,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 14:09:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 867 transitions. [2020-07-07 14:09:05,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-07-07 14:09:05,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:05,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:05,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:09:05,435 INFO L427 AbstractCegarLoop]: === Iteration 4 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash 679708041, now seen corresponding path program 1 times [2020-07-07 14:09:05,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:05,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477047010] [2020-07-07 14:09:05,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:05,811 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:09:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:06,508 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:06,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477047010] [2020-07-07 14:09:06,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:06,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 14:09:06,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504267771] [2020-07-07 14:09:06,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 14:09:06,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:06,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 14:09:06,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:09:06,516 INFO L87 Difference]: Start difference. First operand 750 states and 867 transitions. Second operand 16 states. [2020-07-07 14:09:06,646 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-07 14:09:07,352 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-07 14:09:10,633 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-07 14:09:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:13,335 INFO L93 Difference]: Finished difference Result 1195 states and 1406 transitions. [2020-07-07 14:09:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 14:09:13,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 313 [2020-07-07 14:09:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:13,342 INFO L225 Difference]: With dead ends: 1195 [2020-07-07 14:09:13,342 INFO L226 Difference]: Without dead ends: 763 [2020-07-07 14:09:13,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 14:09:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-07-07 14:09:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 750. [2020-07-07 14:09:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2020-07-07 14:09:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 867 transitions. [2020-07-07 14:09:13,508 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 867 transitions. Word has length 313 [2020-07-07 14:09:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:13,509 INFO L479 AbstractCegarLoop]: Abstraction has 750 states and 867 transitions. [2020-07-07 14:09:13,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 14:09:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 867 transitions. [2020-07-07 14:09:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-07-07 14:09:13,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:13,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:13,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:09:13,513 INFO L427 AbstractCegarLoop]: === Iteration 5 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1399853749, now seen corresponding path program 1 times [2020-07-07 14:09:13,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:13,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059966958] [2020-07-07 14:09:13,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,757 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:09:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:14,245 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:14,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059966958] [2020-07-07 14:09:14,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:14,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:09:14,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533515600] [2020-07-07 14:09:14,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:09:14,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:09:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:09:14,250 INFO L87 Difference]: Start difference. First operand 750 states and 867 transitions. Second operand 12 states. [2020-07-07 14:09:15,742 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-07 14:09:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:19,505 INFO L93 Difference]: Finished difference Result 1642 states and 1947 transitions. [2020-07-07 14:09:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 14:09:19,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 315 [2020-07-07 14:09:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:19,516 INFO L225 Difference]: With dead ends: 1642 [2020-07-07 14:09:19,517 INFO L226 Difference]: Without dead ends: 1210 [2020-07-07 14:09:19,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=347, Invalid=843, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:09:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-07-07 14:09:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1168. [2020-07-07 14:09:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-07-07 14:09:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1376 transitions. [2020-07-07 14:09:19,746 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1376 transitions. Word has length 315 [2020-07-07 14:09:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:19,747 INFO L479 AbstractCegarLoop]: Abstraction has 1168 states and 1376 transitions. [2020-07-07 14:09:19,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:09:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1376 transitions. [2020-07-07 14:09:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-07-07 14:09:19,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:19,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:19,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:09:19,752 INFO L427 AbstractCegarLoop]: === Iteration 6 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1977685633, now seen corresponding path program 1 times [2020-07-07 14:09:19,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:19,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065787586] [2020-07-07 14:09:19,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,002 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:09:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:20,388 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:20,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065787586] [2020-07-07 14:09:20,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:20,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:09:20,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545904188] [2020-07-07 14:09:20,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:09:20,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:20,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:09:20,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:09:20,392 INFO L87 Difference]: Start difference. First operand 1168 states and 1376 transitions. Second operand 12 states. [2020-07-07 14:09:22,646 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-07 14:09:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:26,128 INFO L93 Difference]: Finished difference Result 2588 states and 3126 transitions. [2020-07-07 14:09:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 14:09:26,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 316 [2020-07-07 14:09:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:26,141 INFO L225 Difference]: With dead ends: 2588 [2020-07-07 14:09:26,141 INFO L226 Difference]: Without dead ends: 1828 [2020-07-07 14:09:26,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=348, Invalid=842, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:09:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-07-07 14:09:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1808. [2020-07-07 14:09:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1808 states. [2020-07-07 14:09:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2169 transitions. [2020-07-07 14:09:26,512 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2169 transitions. Word has length 316 [2020-07-07 14:09:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:26,513 INFO L479 AbstractCegarLoop]: Abstraction has 1808 states and 2169 transitions. [2020-07-07 14:09:26,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:09:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2169 transitions. [2020-07-07 14:09:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-07-07 14:09:26,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:26,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:26,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:09:26,518 INFO L427 AbstractCegarLoop]: === Iteration 7 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1013367263, now seen corresponding path program 1 times [2020-07-07 14:09:26,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:26,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959813325] [2020-07-07 14:09:26,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:26,880 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:09:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:27,225 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:27,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959813325] [2020-07-07 14:09:27,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:27,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:09:27,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246802913] [2020-07-07 14:09:27,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:09:27,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:09:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:09:27,228 INFO L87 Difference]: Start difference. First operand 1808 states and 2169 transitions. Second operand 13 states. [2020-07-07 14:09:29,683 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-07 14:09:29,819 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-07 14:09:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:31,159 INFO L93 Difference]: Finished difference Result 3206 states and 3905 transitions. [2020-07-07 14:09:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 14:09:31,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 316 [2020-07-07 14:09:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:31,173 INFO L225 Difference]: With dead ends: 3206 [2020-07-07 14:09:31,173 INFO L226 Difference]: Without dead ends: 1832 [2020-07-07 14:09:31,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:09:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-07-07 14:09:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1832. [2020-07-07 14:09:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1832 states. [2020-07-07 14:09:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2189 transitions. [2020-07-07 14:09:31,683 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2189 transitions. Word has length 316 [2020-07-07 14:09:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:31,684 INFO L479 AbstractCegarLoop]: Abstraction has 1832 states and 2189 transitions. [2020-07-07 14:09:31,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:09:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2189 transitions. [2020-07-07 14:09:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-07 14:09:31,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:31,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:31,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:09:31,689 INFO L427 AbstractCegarLoop]: === Iteration 8 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1065816740, now seen corresponding path program 1 times [2020-07-07 14:09:31,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:31,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498547057] [2020-07-07 14:09:31,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,132 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-07 14:09:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:32,494 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:32,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498547057] [2020-07-07 14:09:32,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:32,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:09:32,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209435327] [2020-07-07 14:09:32,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:09:32,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:32,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:09:32,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:09:32,501 INFO L87 Difference]: Start difference. First operand 1832 states and 2189 transitions. Second operand 13 states. [2020-07-07 14:09:35,084 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-07 14:09:35,228 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-07 14:09:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:36,490 INFO L93 Difference]: Finished difference Result 3254 states and 3957 transitions. [2020-07-07 14:09:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 14:09:36,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 327 [2020-07-07 14:09:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:36,501 INFO L225 Difference]: With dead ends: 3254 [2020-07-07 14:09:36,502 INFO L226 Difference]: Without dead ends: 1856 [2020-07-07 14:09:36,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:09:36,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2020-07-07 14:09:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1856. [2020-07-07 14:09:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1856 states. [2020-07-07 14:09:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2209 transitions. [2020-07-07 14:09:37,007 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2209 transitions. Word has length 327 [2020-07-07 14:09:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:37,008 INFO L479 AbstractCegarLoop]: Abstraction has 1856 states and 2209 transitions. [2020-07-07 14:09:37,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:09:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2209 transitions. [2020-07-07 14:09:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-07 14:09:37,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:37,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:37,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:09:37,014 INFO L427 AbstractCegarLoop]: === Iteration 9 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1818880722, now seen corresponding path program 1 times [2020-07-07 14:09:37,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:37,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317995876] [2020-07-07 14:09:37,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:37,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:09:37,031 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 14:09:37,036 INFO L168 Benchmark]: Toolchain (without parser) took 52083.27 ms. Allocated memory was 143.1 MB in the beginning and 871.4 MB in the end (delta: 728.2 MB). Free memory was 99.7 MB in the beginning and 702.4 MB in the end (delta: -602.7 MB). Peak memory consumption was 125.5 MB. Max. memory is 7.1 GB. [2020-07-07 14:09:37,037 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 14:09:37,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.31 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 99.5 MB in the beginning and 173.4 MB in the end (delta: -73.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:09:37,039 INFO L168 Benchmark]: Boogie Preprocessor took 85.10 ms. Allocated memory is still 200.8 MB. Free memory was 173.4 MB in the beginning and 170.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-07 14:09:37,039 INFO L168 Benchmark]: RCFGBuilder took 1231.38 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 170.6 MB in the beginning and 200.4 MB in the end (delta: -29.8 MB). Peak memory consumption was 92.8 MB. Max. memory is 7.1 GB. [2020-07-07 14:09:37,040 INFO L168 Benchmark]: TraceAbstraction took 50144.96 ms. Allocated memory was 229.6 MB in the beginning and 871.4 MB in the end (delta: 641.7 MB). Free memory was 200.4 MB in the beginning and 702.4 MB in the end (delta: -502.0 MB). Peak memory consumption was 139.7 MB. Max. memory is 7.1 GB. [2020-07-07 14:09:37,044 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 616.31 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 99.5 MB in the beginning and 173.4 MB in the end (delta: -73.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.10 ms. Allocated memory is still 200.8 MB. Free memory was 173.4 MB in the beginning and 170.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1231.38 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 170.6 MB in the beginning and 200.4 MB in the end (delta: -29.8 MB). Peak memory consumption was 92.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 50144.96 ms. Allocated memory was 229.6 MB in the beginning and 871.4 MB in the end (delta: 641.7 MB). Free memory was 200.4 MB in the beginning and 702.4 MB in the end (delta: -502.0 MB). Peak memory consumption was 139.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...