/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:38:57,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:38:57,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:38:57,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:38:57,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:38:57,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:38:57,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:38:57,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:38:57,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:38:57,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:38:57,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:38:57,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:38:57,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:38:57,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:38:57,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:38:57,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:38:57,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:38:57,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:38:57,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:38:57,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:38:57,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:38:57,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:38:57,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:38:57,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:38:57,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:38:57,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:38:57,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:38:57,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:38:57,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:38:57,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:38:57,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:38:57,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:38:57,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:38:57,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:38:57,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:38:57,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:38:57,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:38:57,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:38:57,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:38:57,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:38:57,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:38:57,614 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 [2020-09-21 12:38:57,640 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:38:57,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:38:57,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:38:57,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:38:57,642 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:38:57,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:38:57,643 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:38:57,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:38:57,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:38:57,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:38:57,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:38:57,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:38:57,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:38:57,644 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:38:57,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:38:57,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:38:57,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:38:57,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:38:57,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:38:57,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:38:57,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:38:57,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:38:57,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:38:57,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:38:57,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:38:57,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:38:57,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:38:57,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:38:57,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:38:57,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;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=1000;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=1000;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=1000;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:38:58,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:38:58,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:38:58,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:38:58,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:38:58,164 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:38:58,167 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:58,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ac0d8e01/1795c17a7ab7451dba3d405e032b1b3c/FLAG65ef60e82 [2020-09-21 12:38:58,968 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:38:58,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:59,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ac0d8e01/1795c17a7ab7451dba3d405e032b1b3c/FLAG65ef60e82 [2020-09-21 12:38:59,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ac0d8e01/1795c17a7ab7451dba3d405e032b1b3c [2020-09-21 12:38:59,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:38:59,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:38:59,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:59,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:38:59,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:38:59,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:59" (1/1) ... [2020-09-21 12:38:59,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c31b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:59, skipping insertion in model container [2020-09-21 12:38:59,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:59" (1/1) ... [2020-09-21 12:38:59,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:38:59,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:39:00,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:00,472 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:00,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:00,973 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:00,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00 WrapperNode [2020-09-21 12:39:00,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:00,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:00,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:00,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:01,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:01,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:01,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:01,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:01,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:01,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:01,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:01,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:01,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:01,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:01,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:01,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (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 [2020-09-21 12:39:01,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:39:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:39:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:04,212 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:04,213 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:04,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:04 BoogieIcfgContainer [2020-09-21 12:39:04,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:04,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:04,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:04,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:04,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:38:59" (1/3) ... [2020-09-21 12:39:04,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ecb227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:04, skipping insertion in model container [2020-09-21 12:39:04,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (2/3) ... [2020-09-21 12:39:04,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ecb227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:04, skipping insertion in model container [2020-09-21 12:39:04,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:04" (3/3) ... [2020-09-21 12:39:04,236 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:04,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:04,259 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:39:04,281 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:39:04,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:04,319 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:04,319 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:04,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:04,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:04,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:04,319 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:04,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-09-21 12:39:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 12:39:04,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:04,395 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] [2020-09-21 12:39:04,395 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:04,402 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-09-21 12:39:04,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:04,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726738937] [2020-09-21 12:39:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:07,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:07,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 12:39:07,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:07,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1712 [2020-09-21 12:39:07,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-09-21 12:39:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-09-21 12:39:07,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:39:08,059 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:08,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:08,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:08,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:08,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:08,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-21 12:39:08,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:08,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:08,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:08,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726738937] [2020-09-21 12:39:08,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:08,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:08,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111315490] [2020-09-21 12:39:08,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:08,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:08,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:08,330 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-09-21 12:39:08,887 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:14,242 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-09-21 12:39:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:14,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 12:39:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:14,281 INFO L225 Difference]: With dead ends: 1515 [2020-09-21 12:39:14,282 INFO L226 Difference]: Without dead ends: 1299 [2020-09-21 12:39:14,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-09-21 12:39:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-09-21 12:39:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-09-21 12:39:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-09-21 12:39:14,465 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-09-21 12:39:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:14,471 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-09-21 12:39:14,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-09-21 12:39:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 12:39:14,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:14,487 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] [2020-09-21 12:39:14,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:14,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-09-21 12:39:14,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:14,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113996718] [2020-09-21 12:39:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:15,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:15,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:15,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:15,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 12:39:15,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:15,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-21 12:39:15,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:15,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:15,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-09-21 12:39:15,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-09-21 12:39:15,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:16,728 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:16,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:16,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:16,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:16,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:16,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:16,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-21 12:39:16,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:16,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:17,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113996718] [2020-09-21 12:39:17,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:17,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:17,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824797082] [2020-09-21 12:39:17,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:17,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:17,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:17,065 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-09-21 12:39:17,705 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:22,527 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-09-21 12:39:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:22,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 12:39:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:22,543 INFO L225 Difference]: With dead ends: 2671 [2020-09-21 12:39:22,543 INFO L226 Difference]: Without dead ends: 2289 [2020-09-21 12:39:22,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-09-21 12:39:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-09-21 12:39:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-09-21 12:39:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-09-21 12:39:22,627 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-09-21 12:39:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:22,628 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-09-21 12:39:22,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-09-21 12:39:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 12:39:22,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:22,637 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] [2020-09-21 12:39:22,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:22,637 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-09-21 12:39:22,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:22,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409836544] [2020-09-21 12:39:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:23,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:23,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:23,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:23,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 12:39:23,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:39:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-09-21 12:39:23,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-09-21 12:39:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-21 12:39:24,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:24,779 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:24,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:24,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:24,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:24,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:24,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 12:39:24,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:24,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:24,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409836544] [2020-09-21 12:39:24,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:24,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:24,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132862427] [2020-09-21 12:39:24,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:24,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:24,974 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-09-21 12:39:25,517 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:30,094 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-09-21 12:39:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:30,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 12:39:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:30,118 INFO L225 Difference]: With dead ends: 4943 [2020-09-21 12:39:30,118 INFO L226 Difference]: Without dead ends: 4229 [2020-09-21 12:39:30,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-09-21 12:39:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-09-21 12:39:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-09-21 12:39:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-09-21 12:39:30,257 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-09-21 12:39:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:30,257 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-09-21 12:39:30,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-09-21 12:39:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 12:39:30,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:30,270 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] [2020-09-21 12:39:30,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:39:30,271 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-09-21 12:39:30,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:30,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325752566] [2020-09-21 12:39:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:31,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:31,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:31,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 12:39:31,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:31,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-09-21 12:39:31,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-09-21 12:39:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-09-21 12:39:31,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:39:32,259 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:32,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:32,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:32,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:32,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:32,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-21 12:39:32,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:32,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325752566] [2020-09-21 12:39:32,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:32,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:32,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806902793] [2020-09-21 12:39:32,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:32,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:32,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:32,477 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-09-21 12:39:33,032 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:37,663 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-09-21 12:39:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:37,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 12:39:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:37,702 INFO L225 Difference]: With dead ends: 9359 [2020-09-21 12:39:37,702 INFO L226 Difference]: Without dead ends: 8029 [2020-09-21 12:39:37,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-09-21 12:39:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-09-21 12:39:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-09-21 12:39:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-09-21 12:39:37,980 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-09-21 12:39:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:37,981 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-09-21 12:39:37,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-09-21 12:39:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 12:39:38,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:38,002 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] [2020-09-21 12:39:38,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:39:38,003 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-09-21 12:39:38,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:38,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579443443] [2020-09-21 12:39:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:38,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:39,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:39,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:39,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 12:39:39,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-09-21 12:39:39,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-21 12:39:39,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:40,181 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:40,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:40,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:40,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:40,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 12:39:40,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:40,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579443443] [2020-09-21 12:39:40,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:40,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:40,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593076521] [2020-09-21 12:39:40,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:40,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:40,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:40,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:40,536 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-09-21 12:39:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:49,014 INFO L93 Difference]: Finished difference Result 23718 states and 36711 transitions. [2020-09-21 12:39:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:49,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-09-21 12:39:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:49,075 INFO L225 Difference]: With dead ends: 23718 [2020-09-21 12:39:49,076 INFO L226 Difference]: Without dead ends: 15742 [2020-09-21 12:39:49,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-09-21 12:39:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-09-21 12:39:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-09-21 12:39:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24256 transitions. [2020-09-21 12:39:50,462 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24256 transitions. Word has length 318 [2020-09-21 12:39:50,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:50,463 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24256 transitions. [2020-09-21 12:39:50,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:50,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24256 transitions. [2020-09-21 12:39:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-21 12:39:50,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:50,493 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] [2020-09-21 12:39:50,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:39:50,494 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:50,494 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-09-21 12:39:50,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:50,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904216244] [2020-09-21 12:39:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY