/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_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:25:11,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:25:11,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:25:11,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:25:11,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:25:11,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:25:11,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:25:11,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:25:11,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:25:11,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:25:11,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:25:11,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:25:11,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:25:11,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:25:11,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:25:11,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:25:11,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:25:11,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:25:11,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:25:11,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:25:11,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:25:11,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:25:11,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:25:11,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:25:11,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:25:11,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:25:11,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:25:11,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:25:11,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:25:11,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:25:11,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:25:11,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:25:11,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:25:11,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:25:11,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:25:11,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:25:11,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:25:11,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:25:11,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:25:11,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:25:11,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:25:11,333 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 17:25:11,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:25:11,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:25:11,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:25:11,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:25:11,377 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:25:11,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:25:11,378 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:25:11,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:25:11,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:25:11,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:25:11,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:25:11,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:25:11,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:25:11,380 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:25:11,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:25:11,381 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:25:11,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:25:11,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:25:11,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:25:11,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:25:11,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:25:11,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:25:11,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:25:11,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:25:11,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:25:11,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:25:11,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:25:11,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:25:11,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:25:11,384 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 17:25:11,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:25:11,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:25:11,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:25:11,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:25:11,901 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:25:11,903 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 17:25:12,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab481fb2a/d9d51afde31c4d7fabade58487afe011/FLAG2c75ddedd [2020-09-24 17:25:12,801 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:25:12,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 17:25:12,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab481fb2a/d9d51afde31c4d7fabade58487afe011/FLAG2c75ddedd [2020-09-24 17:25:12,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab481fb2a/d9d51afde31c4d7fabade58487afe011 [2020-09-24 17:25:12,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:25:12,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:25:12,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:25:12,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:25:12,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:25:12,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:25:12" (1/1) ... [2020-09-24 17:25:12,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dffe24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:12, skipping insertion in model container [2020-09-24 17:25:12,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:25:12" (1/1) ... [2020-09-24 17:25:12,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:25:13,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:25:14,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:25:14,780 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:25:16,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:25:16,383 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:25:16,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16 WrapperNode [2020-09-24 17:25:16,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:25:16,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:25:16,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:25:16,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:25:16,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (1/1) ... [2020-09-24 17:25:16,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (1/1) ... [2020-09-24 17:25:16,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (1/1) ... [2020-09-24 17:25:16,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (1/1) ... [2020-09-24 17:25:16,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (1/1) ... [2020-09-24 17:25:16,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (1/1) ... [2020-09-24 17:25:16,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (1/1) ... [2020-09-24 17:25:16,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:25:16,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:25:16,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:25:16,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:25:16,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (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 17:25:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:25:16,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:25:16,745 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:25:16,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:25:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:25:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 17:25:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 17:25:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 17:25:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:25:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:25:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 17:25:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 17:25:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 17:25:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 17:25:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 17:25:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 17:25:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-24 17:25:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 17:25:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 17:25:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:25:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:25:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:25:21,989 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:25:21,989 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:25:22,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:25:22 BoogieIcfgContainer [2020-09-24 17:25:22,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:25:22,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:25:22,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:25:22,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:25:22,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:25:12" (1/3) ... [2020-09-24 17:25:22,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9769cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:25:22, skipping insertion in model container [2020-09-24 17:25:22,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:25:16" (2/3) ... [2020-09-24 17:25:22,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9769cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:25:22, skipping insertion in model container [2020-09-24 17:25:22,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:25:22" (3/3) ... [2020-09-24 17:25:22,036 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 17:25:22,053 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:25:22,073 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:25:22,102 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:25:22,166 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:25:22,167 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:25:22,167 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:25:22,167 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:25:22,168 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:25:22,168 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:25:22,168 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:25:22,168 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:25:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states. [2020-09-24 17:25:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1429 [2020-09-24 17:25:22,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:25:22,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:22,427 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:25:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:25:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1246774295, now seen corresponding path program 1 times [2020-09-24 17:25:22,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:25:22,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658982748] [2020-09-24 17:25:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:25:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:25:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:29,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:30,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:30,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:31,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:36,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:37,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:40,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:41,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:43,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:44,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:45,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:46,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:25:49,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking...