/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:27:05,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:27:05,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:27:05,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:27:05,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:27:05,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:27:05,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:27:05,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:27:05,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:27:05,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:27:05,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:27:05,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:27:05,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:27:05,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:27:05,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:27:05,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:27:05,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:27:05,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:27:05,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:27:05,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:27:05,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:27:05,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:27:05,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:27:05,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:27:05,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:27:05,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:27:05,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:27:05,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:27:05,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:27:05,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:27:05,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:27:05,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:27:05,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:27:05,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:27:05,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:27:05,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:27:05,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:27:05,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:27:05,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:27:05,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:27:05,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:27:05,427 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 [2020-09-25 11:27:05,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:27:05,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:27:05,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:27:05,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:27:05,454 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:27:05,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:27:05,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:27:05,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:27:05,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:27:05,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:27:05,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:27:05,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:27:05,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:27:05,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:27:05,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:27:05,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:27:05,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:27:05,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:27:05,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:27:05,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:27:05,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:27:05,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:27:05,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:27:05,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:27:05,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:27:05,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:27:05,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:27:05,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:27:05,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:27:05,460 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:27:05,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:27:05,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:27:05,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:27:05,923 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:27:05,925 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:27:05,926 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:06,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/739d81328/932ec81cd6b849b3b607a8042749e640/FLAG790387821 [2020-09-25 11:27:06,690 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:27:06,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:06,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/739d81328/932ec81cd6b849b3b607a8042749e640/FLAG790387821 [2020-09-25 11:27:06,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/739d81328/932ec81cd6b849b3b607a8042749e640 [2020-09-25 11:27:06,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:27:06,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:27:06,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:06,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:27:06,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:27:06,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:06" (1/1) ... [2020-09-25 11:27:06,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771bda5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:06, skipping insertion in model container [2020-09-25 11:27:06,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:06" (1/1) ... [2020-09-25 11:27:06,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:27:07,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:27:07,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:07,626 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:27:07,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:07,810 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:27:07,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07 WrapperNode [2020-09-25 11:27:07,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:07,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:27:07,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:27:07,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:27:07,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (1/1) ... [2020-09-25 11:27:07,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (1/1) ... [2020-09-25 11:27:07,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (1/1) ... [2020-09-25 11:27:07,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (1/1) ... [2020-09-25 11:27:07,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (1/1) ... [2020-09-25 11:27:07,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (1/1) ... [2020-09-25 11:27:07,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (1/1) ... [2020-09-25 11:27:07,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:27:07,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:27:07,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:27:07,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:27:07,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (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 [2020-09-25 11:27:08,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:27:08,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:27:08,024 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:27:08,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:27:08,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:27:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 11:27:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 11:27:08,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 11:27:08,028 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 11:27:08,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:27:08,028 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:27:08,028 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 11:27:08,029 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 11:27:08,029 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 11:27:08,029 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 11:27:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 11:27:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 11:27:08,031 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 11:27:08,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:27:08,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:27:08,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:27:09,708 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:27:09,709 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:27:09,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:09 BoogieIcfgContainer [2020-09-25 11:27:09,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:27:09,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:27:09,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:27:09,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:27:09,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:27:06" (1/3) ... [2020-09-25 11:27:09,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abea85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:09, skipping insertion in model container [2020-09-25 11:27:09,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:07" (2/3) ... [2020-09-25 11:27:09,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abea85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:09, skipping insertion in model container [2020-09-25 11:27:09,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:09" (3/3) ... [2020-09-25 11:27:09,741 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:09,754 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:27:09,773 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:27:09,796 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:27:09,837 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:27:09,838 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:27:09,838 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:27:09,838 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:27:09,838 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:27:09,838 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:27:09,839 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:27:09,839 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:27:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 11:27:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 11:27:09,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:09,916 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] [2020-09-25 11:27:09,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 11:27:09,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:09,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245960341] [2020-09-25 11:27:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:10,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:11,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:11,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:11,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:11,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:12,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:12,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:14,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:15,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:15,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 11:27:15,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:27:15,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-09-25 11:27:15,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:15,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:27:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 11:27:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 11:27:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 11:27:16,370 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 11:27:16,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:16,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:16,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:16,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:27:16,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:16,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 11:27:16,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:16,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:16,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:16,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:27:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:27:16,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245960341] [2020-09-25 11:27:16,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:16,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:27:16,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562830610] [2020-09-25 11:27:17,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:27:17,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:27:17,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:27:17,029 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 11:27:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:22,428 INFO L93 Difference]: Finished difference Result 2068 states and 2752 transitions. [2020-09-25 11:27:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:27:22,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 11:27:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:22,472 INFO L225 Difference]: With dead ends: 2068 [2020-09-25 11:27:22,472 INFO L226 Difference]: Without dead ends: 1234 [2020-09-25 11:27:22,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:27:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-25 11:27:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-25 11:27:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-25 11:27:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1499 transitions. [2020-09-25 11:27:22,644 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1499 transitions. Word has length 407 [2020-09-25 11:27:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:22,645 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1499 transitions. [2020-09-25 11:27:22,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:27:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1499 transitions. [2020-09-25 11:27:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 11:27:22,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:22,658 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] [2020-09-25 11:27:22,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:27:22,659 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:22,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1185743993, now seen corresponding path program 1 times [2020-09-25 11:27:22,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:22,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037837955] [2020-09-25 11:27:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:22,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:23,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:23,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:25,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:26,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:27,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:27,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 11:27:27,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:27:27,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 11:27:27,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:27,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:27:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-25 11:27:27,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-25 11:27:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 11:27:28,367 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 11:27:28,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:28,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:28,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:28,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:27:28,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:28,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 11:27:28,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:28,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:28,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:28,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:28,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:27:28,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037837955] [2020-09-25 11:27:28,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:28,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:27:28,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54078990] [2020-09-25 11:27:28,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:27:28,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:28,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:27:28,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:27:28,772 INFO L87 Difference]: Start difference. First operand 1232 states and 1499 transitions. Second operand 5 states. [2020-09-25 11:27:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:33,878 INFO L93 Difference]: Finished difference Result 3229 states and 3979 transitions. [2020-09-25 11:27:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:27:33,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2020-09-25 11:27:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:33,897 INFO L225 Difference]: With dead ends: 3229 [2020-09-25 11:27:33,897 INFO L226 Difference]: Without dead ends: 2231 [2020-09-25 11:27:33,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:27:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-09-25 11:27:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2229. [2020-09-25 11:27:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2229 states. [2020-09-25 11:27:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2728 transitions. [2020-09-25 11:27:34,143 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2728 transitions. Word has length 408 [2020-09-25 11:27:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:34,146 INFO L479 AbstractCegarLoop]: Abstraction has 2229 states and 2728 transitions. [2020-09-25 11:27:34,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:27:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2728 transitions. [2020-09-25 11:27:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 11:27:34,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:34,157 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] [2020-09-25 11:27:34,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:27:34,158 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:34,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-25 11:27:34,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:34,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427402093] [2020-09-25 11:27:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:34,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:36,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:39,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:39,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 11:27:39,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:27:39,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-09-25 11:27:39,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:39,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:27:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-25 11:27:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-09-25 11:27:39,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:39,766 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 11:27:39,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:39,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:39,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:39,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:27:39,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 11:27:39,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:39,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:39,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:39,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:27:40,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427402093] [2020-09-25 11:27:40,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:40,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:27:40,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510842696] [2020-09-25 11:27:40,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:27:40,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:40,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:27:40,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:27:40,287 INFO L87 Difference]: Start difference. First operand 2229 states and 2728 transitions. Second operand 5 states. [2020-09-25 11:27:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:45,027 INFO L93 Difference]: Finished difference Result 5684 states and 6998 transitions. [2020-09-25 11:27:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:27:45,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 11:27:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:45,046 INFO L225 Difference]: With dead ends: 5684 [2020-09-25 11:27:45,047 INFO L226 Difference]: Without dead ends: 4086 [2020-09-25 11:27:45,051 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 [2020-09-25 11:27:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2020-09-25 11:27:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 4084. [2020-09-25 11:27:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4084 states. [2020-09-25 11:27:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 4988 transitions. [2020-09-25 11:27:45,235 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 4988 transitions. Word has length 409 [2020-09-25 11:27:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:45,242 INFO L479 AbstractCegarLoop]: Abstraction has 4084 states and 4988 transitions. [2020-09-25 11:27:45,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:27:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 4988 transitions. [2020-09-25 11:27:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-25 11:27:45,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:45,254 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] [2020-09-25 11:27:45,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:27:45,254 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash 325014321, now seen corresponding path program 1 times [2020-09-25 11:27:45,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:45,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714959453] [2020-09-25 11:27:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:45,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:49,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:49,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:49,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:50,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:50,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-25 11:27:50,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 11:27:50,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 11:27:50,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:50,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:27:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-25 11:27:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-09-25 11:27:50,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:50,797 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 11:27:50,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:50,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:50,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:50,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:27:50,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 11:27:50,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:50,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:50,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:27:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:27:51,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714959453] [2020-09-25 11:27:51,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:51,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:27:51,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595154901] [2020-09-25 11:27:51,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:27:51,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:27:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:27:51,157 INFO L87 Difference]: Start difference. First operand 4084 states and 4988 transitions. Second operand 5 states.