/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:56:01,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:56:01,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:56:01,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:56:01,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:56:01,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:56:01,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:56:01,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:56:01,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:56:01,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:56:01,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:56:01,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:56:01,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:56:01,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:56:01,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:56:01,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:56:01,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:56:01,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:56:01,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:56:01,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:56:01,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:56:01,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:56:01,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:56:01,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:56:01,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:56:01,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:56:01,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:56:01,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:56:01,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:56:01,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:56:01,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:56:01,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:56:01,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:56:01,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:56:01,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:56:01,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:56:01,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:56:01,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:56:01,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:56:01,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:56:01,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:56:01,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:56:01,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:56:01,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:56:01,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:56:01,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:56:01,614 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:56:01,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:56:01,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:56:01,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:56:01,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:56:01,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:56:01,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:56:01,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:56:01,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:56:01,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:56:01,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:56:01,620 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:56:01,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:56:01,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:56:01,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:56:01,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:56:01,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:56:01,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:56:01,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:56:01,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:56:01,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:56:01,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:56:01,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:56:01,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:56:01,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:56:01,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:56:01,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:56:01,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:56:01,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:56:01,923 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:56:01,925 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:56:01,926 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 23:56:01,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95326ccd9/9836c597f8fa4d8ebb5e1ebfdcc2982e/FLAG9d929c3fe [2020-08-21 23:56:02,440 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:56:02,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 23:56:02,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95326ccd9/9836c597f8fa4d8ebb5e1ebfdcc2982e/FLAG9d929c3fe [2020-08-21 23:56:02,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95326ccd9/9836c597f8fa4d8ebb5e1ebfdcc2982e [2020-08-21 23:56:02,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:56:02,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:56:02,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:56:02,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:56:02,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:56:02,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:56:02" (1/1) ... [2020-08-21 23:56:02,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7548529f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:02, skipping insertion in model container [2020-08-21 23:56:02,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:56:02" (1/1) ... [2020-08-21 23:56:02,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:56:02,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:56:03,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:56:03,316 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:56:03,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:56:03,441 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:56:03,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03 WrapperNode [2020-08-21 23:56:03,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:56:03,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:56:03,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:56:03,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:56:03,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... [2020-08-21 23:56:03,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... [2020-08-21 23:56:03,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... [2020-08-21 23:56:03,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... [2020-08-21 23:56:03,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... [2020-08-21 23:56:03,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... [2020-08-21 23:56:03,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... [2020-08-21 23:56:03,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:56:03,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:56:03,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:56:03,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:56:03,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 23:56:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:56:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:56:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:56:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:56:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-21 23:56:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 23:56:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:56:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:56:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:56:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:56:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 23:56:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 23:56:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:56:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:56:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:56:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 23:56:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:56:06,834 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:56:06,834 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 23:56:06,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:56:06 BoogieIcfgContainer [2020-08-21 23:56:06,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:56:06,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:56:06,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:56:06,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:56:06,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:56:02" (1/3) ... [2020-08-21 23:56:06,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e99898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:56:06, skipping insertion in model container [2020-08-21 23:56:06,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:03" (2/3) ... [2020-08-21 23:56:06,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e99898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:56:06, skipping insertion in model container [2020-08-21 23:56:06,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:56:06" (3/3) ... [2020-08-21 23:56:06,847 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-21 23:56:06,858 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:56:06,865 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:56:06,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:56:06,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:56:06,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:56:06,904 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:56:06,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:56:06,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:56:06,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:56:06,905 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:56:06,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:56:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-21 23:56:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 23:56:06,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:56:06,932 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] [2020-08-21 23:56:06,933 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:56:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:56:06,940 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-21 23:56:06,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:56:06,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890570984] [2020-08-21 23:56:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:56:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:07,953 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-21 23:56:07,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:56:08,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890570984] [2020-08-21 23:56:08,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:56:08,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 23:56:08,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721820467] [2020-08-21 23:56:08,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 23:56:08,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:08,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 23:56:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:56:08,066 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-21 23:56:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:56:29,336 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-21 23:56:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:56:29,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-21 23:56:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:56:29,357 INFO L225 Difference]: With dead ends: 92 [2020-08-21 23:56:29,358 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 23:56:29,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:56:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 23:56:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 23:56:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 23:56:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-21 23:56:29,418 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-21 23:56:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:56:29,419 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-21 23:56:29,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 23:56:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-21 23:56:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 23:56:29,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:56:29,423 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 23:56:29,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:56:29,423 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:56:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:56:29,424 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-21 23:56:29,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:56:29,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533822026] [2020-08-21 23:56:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:56:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:29,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:56:29,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533822026] [2020-08-21 23:56:29,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:56:29,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 23:56:29,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3681111] [2020-08-21 23:56:29,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 23:56:29,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 23:56:29,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:56:29,939 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-21 23:56:30,195 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-21 23:56:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:56:52,973 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-21 23:56:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:56:52,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 23:56:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:56:52,977 INFO L225 Difference]: With dead ends: 65 [2020-08-21 23:56:52,977 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 23:56:52,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-21 23:56:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 23:56:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-21 23:56:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 23:56:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-21 23:56:52,987 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-21 23:56:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:56:52,988 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-21 23:56:52,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 23:56:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-21 23:56:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 23:56:52,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:56:52,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:56:52,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:56:52,992 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:56:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:56:52,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-21 23:56:52,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:56:52,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855217531] [2020-08-21 23:56:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:56:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:53,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:56:53,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855217531] [2020-08-21 23:56:53,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:56:53,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 23:56:53,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839790771] [2020-08-21 23:56:53,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 23:56:53,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:53,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 23:56:53,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-21 23:56:53,606 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-21 23:57:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:18,736 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-21 23:57:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 23:57:18,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-21 23:57:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:18,739 INFO L225 Difference]: With dead ends: 70 [2020-08-21 23:57:18,739 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 23:57:18,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-21 23:57:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 23:57:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-21 23:57:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 23:57:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-21 23:57:18,750 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-21 23:57:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:18,750 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-21 23:57:18,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 23:57:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-21 23:57:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 23:57:18,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:18,752 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:18,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:57:18,753 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-21 23:57:18,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:18,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873884570] [2020-08-21 23:57:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:57:19,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873884570] [2020-08-21 23:57:19,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:19,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 23:57:19,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142717041] [2020-08-21 23:57:19,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 23:57:19,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:19,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 23:57:19,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:57:19,261 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states.