/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:24:14,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:24:14,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:24:14,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:24:14,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:24:14,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:24:14,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:24:14,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:24:14,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:24:14,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:24:14,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:24:14,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:24:14,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:24:14,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:24:14,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:24:14,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:24:14,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:24:14,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:24:14,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:24:14,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:24:14,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:24:14,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:24:14,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:24:14,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:24:14,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:24:14,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:24:14,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:24:14,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:24:14,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:24:14,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:24:14,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:24:14,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:24:14,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:24:14,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:24:14,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:24:14,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:24:14,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:24:14,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:24:14,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:24:14,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:24:14,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:24:14,862 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 17:24:14,922 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:24:14,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:24:14,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:24:14,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:24:14,924 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:24:14,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:24:14,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:24:14,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:24:14,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:24:14,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:24:14,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:24:14,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:24:14,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:24:14,926 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:24:14,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:24:14,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:24:14,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:24:14,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:24:14,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:24:14,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:24:14,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:24:14,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:24:14,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:24:14,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:24:14,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:24:14,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:24:14,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:24:14,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:24:14,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:24:14,929 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:24:15,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:24:15,521 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:24:15,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:24:15,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:24:15,530 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:24:15,532 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 17:24:15,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24a94ee3f/064a3c162aba48feaa354809d0e82155/FLAGb52d35bec [2020-09-24 17:24:16,450 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:24:16,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 17:24:16,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24a94ee3f/064a3c162aba48feaa354809d0e82155/FLAGb52d35bec [2020-09-24 17:24:16,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24a94ee3f/064a3c162aba48feaa354809d0e82155 [2020-09-24 17:24:17,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:24:17,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:24:17,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:24:17,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:24:17,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:24:17,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:24:16" (1/1) ... [2020-09-24 17:24:17,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701ef800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:17, skipping insertion in model container [2020-09-24 17:24:17,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:24:16" (1/1) ... [2020-09-24 17:24:17,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:24:17,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:24:18,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:24:18,773 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:24:19,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:24:20,025 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:24:20,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20 WrapperNode [2020-09-24 17:24:20,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:24:20,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:24:20,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:24:20,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:24:20,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (1/1) ... [2020-09-24 17:24:20,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (1/1) ... [2020-09-24 17:24:20,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (1/1) ... [2020-09-24 17:24:20,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (1/1) ... [2020-09-24 17:24:20,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (1/1) ... [2020-09-24 17:24:20,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (1/1) ... [2020-09-24 17:24:20,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (1/1) ... [2020-09-24 17:24:20,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:24:20,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:24:20,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:24:20,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:24:20,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (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 17:24:20,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:24:20,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:24:20,418 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:24:20,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:24:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:24:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 17:24:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 17:24:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 17:24:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 17:24:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:24:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:24:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 17:24:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 17:24:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 17:24:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 17:24:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 17:24:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 17:24:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-24 17:24:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 17:24:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 17:24:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:24:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:24:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:24:25,861 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:24:25,862 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:24:25,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:24:25 BoogieIcfgContainer [2020-09-24 17:24:25,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:24:25,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:24:25,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:24:25,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:24:25,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:24:16" (1/3) ... [2020-09-24 17:24:25,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da43bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:24:25, skipping insertion in model container [2020-09-24 17:24:25,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:24:20" (2/3) ... [2020-09-24 17:24:25,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da43bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:24:25, skipping insertion in model container [2020-09-24 17:24:25,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:24:25" (3/3) ... [2020-09-24 17:24:25,896 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 17:24:25,908 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:24:25,924 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-24 17:24:25,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-24 17:24:25,993 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:24:25,993 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:24:25,993 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:24:25,993 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:24:25,993 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:24:25,993 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:24:25,994 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:24:25,994 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:24:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states. [2020-09-24 17:24:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1325 [2020-09-24 17:24:26,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:24:26,216 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, 1] [2020-09-24 17:24:26,217 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:24:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:24:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 328574873, now seen corresponding path program 1 times [2020-09-24 17:24:26,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:24:26,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85705370] [2020-09-24 17:24:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:24:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:24:29,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:31,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:32,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:33,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:33,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:34,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:35,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:38,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:39,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:40,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:42,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:43,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:44,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:45,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:47,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:48,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:24:49,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking...