/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:10:51,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:10:51,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:10:51,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:10:51,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:10:51,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:10:51,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:10:51,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:10:51,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:10:51,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:10:51,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:10:51,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:10:51,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:10:51,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:10:51,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:10:51,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:10:51,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:10:51,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:10:51,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:10:51,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:10:51,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:10:51,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:10:51,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:10:51,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:10:51,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:10:51,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:10:51,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:10:51,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:10:51,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:10:51,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:10:51,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:10:51,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:10:51,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:10:51,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:10:51,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:10:51,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:10:51,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:10:51,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:10:51,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:10:51,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:10:51,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:10:51,150 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 [2020-09-24 15:10:51,179 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:10:51,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:10:51,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:10:51,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:10:51,181 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:10:51,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:10:51,181 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:10:51,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:10:51,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:10:51,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:10:51,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:10:51,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:10:51,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:10:51,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:10:51,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:10:51,183 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:10:51,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:10:51,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:10:51,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:10:51,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:10:51,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:10:51,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:10:51,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:10:51,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:10:51,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:10:51,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:10:51,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:10:51,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:10:51,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:10:51,186 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:10:51,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:10:51,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:10:51,665 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:10:51,667 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:10:51,667 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:10:51,669 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 15:10:51,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80e065e08/cfeebdba9b724822bac55aa7b48d0b7b/FLAG15e2c61dc [2020-09-24 15:10:52,498 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:10:52,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 15:10:52,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80e065e08/cfeebdba9b724822bac55aa7b48d0b7b/FLAG15e2c61dc [2020-09-24 15:10:52,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80e065e08/cfeebdba9b724822bac55aa7b48d0b7b [2020-09-24 15:10:52,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:10:52,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:10:52,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:10:52,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:10:52,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:10:52,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:10:52" (1/1) ... [2020-09-24 15:10:52,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@202a755b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:52, skipping insertion in model container [2020-09-24 15:10:52,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:10:52" (1/1) ... [2020-09-24 15:10:52,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:10:52,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:10:54,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:10:54,389 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:10:55,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:10:55,442 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:10:55,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55 WrapperNode [2020-09-24 15:10:55,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:10:55,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:10:55,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:10:55,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:10:55,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (1/1) ... [2020-09-24 15:10:55,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (1/1) ... [2020-09-24 15:10:55,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (1/1) ... [2020-09-24 15:10:55,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (1/1) ... [2020-09-24 15:10:55,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (1/1) ... [2020-09-24 15:10:55,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (1/1) ... [2020-09-24 15:10:55,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (1/1) ... [2020-09-24 15:10:55,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:10:55,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:10:55,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:10:55,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:10:55,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (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 [2020-09-24 15:10:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:10:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:10:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 15:10:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:10:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:10:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 15:10:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 15:10:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 15:10:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 15:10:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 15:10:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 15:10:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 15:10:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 15:10:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 15:10:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 15:10:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 15:10:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 15:10:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-24 15:10:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 15:10:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 15:10:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:10:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:10:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:11:00,948 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:11:00,949 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 15:11:00,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:00 BoogieIcfgContainer [2020-09-24 15:11:00,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:11:00,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:11:00,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:11:00,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:11:00,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:10:52" (1/3) ... [2020-09-24 15:11:00,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1787c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:00, skipping insertion in model container [2020-09-24 15:11:00,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:55" (2/3) ... [2020-09-24 15:11:00,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1787c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:00, skipping insertion in model container [2020-09-24 15:11:00,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:00" (3/3) ... [2020-09-24 15:11:00,979 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 15:11:00,990 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:11:01,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:11:01,030 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:11:01,065 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:11:01,065 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:11:01,066 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:11:01,066 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:11:01,066 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:11:01,066 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:11:01,066 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:11:01,066 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:11:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states. [2020-09-24 15:11:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2020-09-24 15:11:01,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:11:01,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:11:01,237 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:11:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:11:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -123251649, now seen corresponding path program 1 times [2020-09-24 15:11:01,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:11:01,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168471464] [2020-09-24 15:11:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:11:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:04,775 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-24 15:11:04,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:11:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:11:05,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168471464] [2020-09-24 15:11:05,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:11:05,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:11:05,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51161600] [2020-09-24 15:11:05,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:11:05,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:11:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:11:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:11:05,930 INFO L87 Difference]: Start difference. First operand 3169 states. Second operand 4 states. [2020-09-24 15:11:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:11:21,988 INFO L93 Difference]: Finished difference Result 5200 states and 6970 transitions. [2020-09-24 15:11:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:11:21,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1323 [2020-09-24 15:11:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:11:22,048 INFO L225 Difference]: With dead ends: 5200 [2020-09-24 15:11:22,048 INFO L226 Difference]: Without dead ends: 4300 [2020-09-24 15:11:22,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:11:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2020-09-24 15:11:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4283. [2020-09-24 15:11:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4283 states. [2020-09-24 15:11:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4283 states to 4283 states and 5522 transitions. [2020-09-24 15:11:22,262 INFO L78 Accepts]: Start accepts. Automaton has 4283 states and 5522 transitions. Word has length 1323 [2020-09-24 15:11:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:11:22,265 INFO L479 AbstractCegarLoop]: Abstraction has 4283 states and 5522 transitions. [2020-09-24 15:11:22,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:11:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4283 states and 5522 transitions. [2020-09-24 15:11:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2020-09-24 15:11:22,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:11:22,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:11:22,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:11:22,434 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:11:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:11:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1787910879, now seen corresponding path program 1 times [2020-09-24 15:11:22,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:11:22,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325678777] [2020-09-24 15:11:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:11:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:26,695 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-24 15:11:26,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:11:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:11:28,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325678777] [2020-09-24 15:11:28,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:11:28,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:11:28,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274038104] [2020-09-24 15:11:28,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:11:28,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:11:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:11:28,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:11:28,663 INFO L87 Difference]: Start difference. First operand 4283 states and 5522 transitions. Second operand 5 states.