/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:32:40,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:32:40,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:32:40,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:32:40,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:32:40,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:32:40,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:32:40,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:32:40,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:32:40,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:32:40,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:32:40,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:32:40,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:32:40,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:32:40,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:32:40,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:32:40,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:32:40,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:32:40,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:32:40,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:32:40,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:32:40,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:32:40,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:32:40,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:32:40,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:32:40,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:32:40,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:32:40,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:32:40,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:32:40,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:32:40,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:32:40,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:32:40,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:32:40,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:32:40,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:32:40,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:32:40,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:32:40,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:32:40,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:32:40,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:32:40,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:32:40,591 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 18:32:40,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:32:40,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:32:40,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:32:40,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:32:40,639 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:32:40,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:32:40,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:32:40,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:32:40,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:32:40,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:32:40,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:32:40,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:32:40,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:32:40,642 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:32:40,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:32:40,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:32:40,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:32:40,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:32:40,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:32:40,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:32:40,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:32:40,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:32:40,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:32:40,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:32:40,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:32:40,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:32:40,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:32:40,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:32:40,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:32:40,652 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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:32:41,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:32:41,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:32:41,147 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:32:41,149 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:32:41,150 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:32:41,151 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 18:32:41,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0df4cee44/d696949d75bd4d8fa399b40cf9993123/FLAG930a3cc07 [2020-09-24 18:32:41,885 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:32:41,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 18:32:41,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0df4cee44/d696949d75bd4d8fa399b40cf9993123/FLAG930a3cc07 [2020-09-24 18:32:42,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0df4cee44/d696949d75bd4d8fa399b40cf9993123 [2020-09-24 18:32:42,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:32:42,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:32:42,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:42,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:32:42,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:32:42,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:42" (1/1) ... [2020-09-24 18:32:42,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:42, skipping insertion in model container [2020-09-24 18:32:42,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:42" (1/1) ... [2020-09-24 18:32:42,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:32:42,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:32:42,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:42,898 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:32:43,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:43,106 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:32:43,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43 WrapperNode [2020-09-24 18:32:43,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:43,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:32:43,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:32:43,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:32:43,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:32:43,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:32:43,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:32:43,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:32:43,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (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 18:32:43,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:32:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:32:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 18:32:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:32:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:32:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:32:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 18:32:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 18:32:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:32:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 18:32:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 18:32:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 18:32:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 18:32:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 18:32:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 18:32:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 18:32:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 18:32:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:32:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:32:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:32:45,139 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:32:45,140 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:32:45,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:45 BoogieIcfgContainer [2020-09-24 18:32:45,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:32:45,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:32:45,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:32:45,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:32:45,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:32:42" (1/3) ... [2020-09-24 18:32:45,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a491ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:45, skipping insertion in model container [2020-09-24 18:32:45,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43" (2/3) ... [2020-09-24 18:32:45,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a491ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:45, skipping insertion in model container [2020-09-24 18:32:45,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:45" (3/3) ... [2020-09-24 18:32:45,165 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 18:32:45,180 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:32:45,193 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:32:45,219 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:32:45,258 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:32:45,258 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:32:45,259 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:32:45,259 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:32:45,259 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:32:45,259 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:32:45,259 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:32:45,260 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:32:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-24 18:32:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 18:32:45,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:32:45,341 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] [2020-09-24 18:32:45,342 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:32:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:32:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-24 18:32:45,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:32:45,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68918785] [2020-09-24 18:32:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:32:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:46,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:47,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:47,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:47,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:51,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:51,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 18:32:51,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:32:51,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-24 18:32:51,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:51,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:32:51,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-09-24 18:32:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-24 18:32:51,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 18:32:51,911 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 18:32:51,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:32:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:51,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:52,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:52,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:32:52,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:32:52,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 18:32:52,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:52,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:32:52,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:32:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:32:52,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:32:52,404 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 18:32:52,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68918785] [2020-09-24 18:32:52,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:32:52,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:32:52,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621010717] [2020-09-24 18:32:52,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:32:52,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:32:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:32:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:32:52,443 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 4 states. [2020-09-24 18:32:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:32:56,461 INFO L93 Difference]: Finished difference Result 1664 states and 2163 transitions. [2020-09-24 18:32:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:32:56,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-24 18:32:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:32:56,499 INFO L225 Difference]: With dead ends: 1664 [2020-09-24 18:32:56,499 INFO L226 Difference]: Without dead ends: 1251 [2020-09-24 18:32:56,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:32:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-09-24 18:32:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1244. [2020-09-24 18:32:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-24 18:32:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1517 transitions. [2020-09-24 18:32:56,650 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1517 transitions. Word has length 460 [2020-09-24 18:32:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:32:56,652 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1517 transitions. [2020-09-24 18:32:56,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:32:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1517 transitions. [2020-09-24 18:32:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 18:32:56,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:32:56,662 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] [2020-09-24 18:32:56,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:32:56,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:32:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:32:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1495383786, now seen corresponding path program 1 times [2020-09-24 18:32:56,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:32:56,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162540385] [2020-09-24 18:32:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:32:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:56,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:57,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:57,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:58,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:01,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:01,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 18:33:01,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:33:01,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-24 18:33:01,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:33:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-09-24 18:33:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-09-24 18:33:01,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:02,312 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 18:33:02,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:02,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:02,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:02,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:33:02,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 18:33:02,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:02,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:02,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:02,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:02,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:02,737 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 18:33:02,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162540385] [2020-09-24 18:33:02,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:02,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:33:02,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509244556] [2020-09-24 18:33:02,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:33:02,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:33:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:02,744 INFO L87 Difference]: Start difference. First operand 1244 states and 1517 transitions. Second operand 4 states. [2020-09-24 18:33:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:05,787 INFO L93 Difference]: Finished difference Result 2510 states and 3146 transitions. [2020-09-24 18:33:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:33:05,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-24 18:33:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:05,802 INFO L225 Difference]: With dead ends: 2510 [2020-09-24 18:33:05,803 INFO L226 Difference]: Without dead ends: 2066 [2020-09-24 18:33:05,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-09-24 18:33:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2054. [2020-09-24 18:33:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-09-24 18:33:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2545 transitions. [2020-09-24 18:33:05,876 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2545 transitions. Word has length 460 [2020-09-24 18:33:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:05,877 INFO L479 AbstractCegarLoop]: Abstraction has 2054 states and 2545 transitions. [2020-09-24 18:33:05,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:33:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2545 transitions. [2020-09-24 18:33:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 18:33:05,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:05,888 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] [2020-09-24 18:33:05,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:33:05,889 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -863833942, now seen corresponding path program 1 times [2020-09-24 18:33:05,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:05,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817937822] [2020-09-24 18:33:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:06,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:06,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:06,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:06,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:06,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:06,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:11,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 18:33:11,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:33:11,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-24 18:33:11,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:11,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:33:11,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-24 18:33:11,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-24 18:33:11,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:11,436 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 18:33:11,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:11,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:33:11,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:11,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 18:33:11,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:11,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:11,855 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 18:33:11,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817937822] [2020-09-24 18:33:11,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:11,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:33:11,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668780261] [2020-09-24 18:33:11,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:33:11,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:11,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:33:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:11,863 INFO L87 Difference]: Start difference. First operand 2054 states and 2545 transitions. Second operand 4 states. [2020-09-24 18:33:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:14,462 INFO L93 Difference]: Finished difference Result 4382 states and 5559 transitions. [2020-09-24 18:33:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:33:14,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-24 18:33:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:14,480 INFO L225 Difference]: With dead ends: 4382 [2020-09-24 18:33:14,480 INFO L226 Difference]: Without dead ends: 3596 [2020-09-24 18:33:14,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-09-24 18:33:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3574. [2020-09-24 18:33:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-09-24 18:33:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4481 transitions. [2020-09-24 18:33:14,585 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4481 transitions. Word has length 460 [2020-09-24 18:33:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:14,586 INFO L479 AbstractCegarLoop]: Abstraction has 3574 states and 4481 transitions. [2020-09-24 18:33:14,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:33:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4481 transitions. [2020-09-24 18:33:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 18:33:14,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:14,599 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] [2020-09-24 18:33:14,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:33:14,599 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1795052938, now seen corresponding path program 1 times [2020-09-24 18:33:14,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:14,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500104882] [2020-09-24 18:33:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:14,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:15,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:15,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:15,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:15,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:17,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:19,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:19,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 18:33:19,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 18:33:19,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 18:33:19,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:33:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-24 18:33:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-24 18:33:19,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:20,135 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 18:33:20,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:20,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:20,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:20,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:33:20,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 18:33:20,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:20,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:20,408 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 18:33:20,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500104882] [2020-09-24 18:33:20,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:20,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:33:20,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196301437] [2020-09-24 18:33:20,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:33:20,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:33:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:33:20,411 INFO L87 Difference]: Start difference. First operand 3574 states and 4481 transitions. Second operand 5 states. [2020-09-24 18:33:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:24,774 INFO L93 Difference]: Finished difference Result 10129 states and 12758 transitions. [2020-09-24 18:33:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:33:24,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-24 18:33:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:24,804 INFO L225 Difference]: With dead ends: 10129 [2020-09-24 18:33:24,805 INFO L226 Difference]: Without dead ends: 6756 [2020-09-24 18:33:24,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:33:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6756 states. [2020-09-24 18:33:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6756 to 6754. [2020-09-24 18:33:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6754 states. [2020-09-24 18:33:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6754 states to 6754 states and 8453 transitions. [2020-09-24 18:33:25,006 INFO L78 Accepts]: Start accepts. Automaton has 6754 states and 8453 transitions. Word has length 460 [2020-09-24 18:33:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:25,007 INFO L479 AbstractCegarLoop]: Abstraction has 6754 states and 8453 transitions. [2020-09-24 18:33:25,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:33:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6754 states and 8453 transitions. [2020-09-24 18:33:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-24 18:33:25,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:25,028 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] [2020-09-24 18:33:25,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:33:25,029 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash 193590654, now seen corresponding path program 1 times [2020-09-24 18:33:25,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:25,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026150496] [2020-09-24 18:33:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:25,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:25,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:25,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:27,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking...