/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:54:49,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:54:49,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:54:49,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:54:49,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:54:49,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:54:49,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:54:49,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:54:49,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:54:49,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:54:49,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:54:49,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:54:49,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:54:49,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:54:49,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:54:49,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:54:49,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:54:49,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:54:49,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:54:49,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:54:49,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:54:49,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:54:49,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:54:49,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:54:49,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:54:49,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:54:49,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:54:49,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:54:49,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:54:49,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:54:49,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:54:49,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:54:49,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:54:49,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:54:49,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:54:49,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:54:49,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:54:49,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:54:49,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:54:49,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:54:49,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:54:49,851 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 06:54:49,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:54:49,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:54:49,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:54:49,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:54:49,909 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:54:49,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:54:49,910 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:54:49,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:54:49,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:54:49,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:54:49,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:54:49,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:54:49,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:54:49,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:54:49,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:54:49,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:54:49,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:54:49,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:54:49,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:54:49,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:54:49,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:54:49,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:54:49,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:54:49,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:54:49,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:54:49,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:54:49,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:54:49,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:54:49,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:54:49,917 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:54:50,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:54:50,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:54:50,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:54:50,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:54:50,391 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:54:50,393 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 06:54:50,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13d138974/7f40d16a218948fc8a15af4e64705a1a/FLAG859a75a8b [2020-09-25 06:54:51,138 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:54:51,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 06:54:51,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13d138974/7f40d16a218948fc8a15af4e64705a1a/FLAG859a75a8b [2020-09-25 06:54:51,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13d138974/7f40d16a218948fc8a15af4e64705a1a [2020-09-25 06:54:51,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:54:51,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:54:51,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:54:51,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:54:51,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:54:51,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:54:51" (1/1) ... [2020-09-25 06:54:51,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e04f8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:51, skipping insertion in model container [2020-09-25 06:54:51,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:54:51" (1/1) ... [2020-09-25 06:54:51,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:54:51,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:54:52,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:54:52,234 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:54:52,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:54:52,679 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:54:52,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52 WrapperNode [2020-09-25 06:54:52,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:54:52,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:54:52,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:54:52,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:54:52,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (1/1) ... [2020-09-25 06:54:52,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (1/1) ... [2020-09-25 06:54:52,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (1/1) ... [2020-09-25 06:54:52,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (1/1) ... [2020-09-25 06:54:52,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (1/1) ... [2020-09-25 06:54:52,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (1/1) ... [2020-09-25 06:54:52,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (1/1) ... [2020-09-25 06:54:52,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:54:52,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:54:52,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:54:52,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:54:52,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (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 06:54:52,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:54:52,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:54:52,956 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:54:52,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:54:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:54:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:54:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 06:54:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 06:54:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:54:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:54:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 06:54:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 06:54:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 06:54:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 06:54:52,960 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 06:54:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 06:54:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 06:54:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:54:52,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:54:52,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:54:55,201 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:54:55,202 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 06:54:55,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:54:55 BoogieIcfgContainer [2020-09-25 06:54:55,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:54:55,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:54:55,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:54:55,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:54:55,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:54:51" (1/3) ... [2020-09-25 06:54:55,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6496dc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:54:55, skipping insertion in model container [2020-09-25 06:54:55,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:54:52" (2/3) ... [2020-09-25 06:54:55,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6496dc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:54:55, skipping insertion in model container [2020-09-25 06:54:55,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:54:55" (3/3) ... [2020-09-25 06:54:55,225 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 06:54:55,238 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:54:55,250 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 06:54:55,273 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 06:54:55,308 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:54:55,309 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:54:55,309 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:54:55,309 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:54:55,309 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:54:55,309 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:54:55,309 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:54:55,309 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:54:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states. [2020-09-25 06:54:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 06:54:55,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:54:55,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:54:55,404 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:54:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:54:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times [2020-09-25 06:54:55,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:54:55,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447683937] [2020-09-25 06:54:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:54:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:54:56,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:56,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:57,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:57,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:57,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:01,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:01,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 06:55:01,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:55:01,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-09-25 06:55:01,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:01,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:01,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:55:01,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-09-25 06:55:01,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 06:55:01,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 06:55:01,901 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 06:55:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:01,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:01,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:01,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 06:55:01,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:01,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 06:55:01,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:01,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:01,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:01,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:01,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:01,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:55:02,284 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 06:55:02,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447683937] [2020-09-25 06:55:02,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:02,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:55:02,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108904217] [2020-09-25 06:55:02,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:55:02,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:55:02,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:02,321 INFO L87 Difference]: Start difference. First operand 1127 states. Second operand 4 states. [2020-09-25 06:55:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:07,222 INFO L93 Difference]: Finished difference Result 1833 states and 2360 transitions. [2020-09-25 06:55:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:55:07,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-09-25 06:55:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:07,259 INFO L225 Difference]: With dead ends: 1833 [2020-09-25 06:55:07,259 INFO L226 Difference]: Without dead ends: 1303 [2020-09-25 06:55:07,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-09-25 06:55:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296. [2020-09-25 06:55:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-09-25 06:55:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions. [2020-09-25 06:55:07,405 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423 [2020-09-25 06:55:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:07,410 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions. [2020-09-25 06:55:07,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:55:07,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions. [2020-09-25 06:55:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 06:55:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:07,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:55:07,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:55:07,424 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:07,426 INFO L82 PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times [2020-09-25 06:55:07,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:07,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816770479] [2020-09-25 06:55:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:07,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:08,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:08,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:08,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:08,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:08,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:11,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:12,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 06:55:12,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 06:55:12,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-25 06:55:12,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:12,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:12,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:55:12,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-25 06:55:12,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 06:55:12,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:13,221 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 06:55:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:13,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:13,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:13,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 06:55:13,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:13,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 06:55:13,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:13,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:13,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:13,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:13,867 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 06:55:13,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816770479] [2020-09-25 06:55:13,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:13,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:55:13,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294464191] [2020-09-25 06:55:13,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:55:13,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:55:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:55:13,874 INFO L87 Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states. [2020-09-25 06:55:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:20,977 INFO L93 Difference]: Finished difference Result 3348 states and 4039 transitions. [2020-09-25 06:55:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:55:20,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-09-25 06:55:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:20,989 INFO L225 Difference]: With dead ends: 3348 [2020-09-25 06:55:20,990 INFO L226 Difference]: Without dead ends: 2358 [2020-09-25 06:55:20,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:55:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2020-09-25 06:55:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2236. [2020-09-25 06:55:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2236 states. [2020-09-25 06:55:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 2703 transitions. [2020-09-25 06:55:21,082 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 2703 transitions. Word has length 423 [2020-09-25 06:55:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:21,083 INFO L479 AbstractCegarLoop]: Abstraction has 2236 states and 2703 transitions. [2020-09-25 06:55:21,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:55:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 2703 transitions. [2020-09-25 06:55:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-09-25 06:55:21,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:21,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:55:21,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:55:21,090 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1675164715, now seen corresponding path program 1 times [2020-09-25 06:55:21,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:21,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988833983] [2020-09-25 06:55:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:21,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:21,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:21,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:21,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:21,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:25,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:26,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:26,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-09-25 06:55:26,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:55:26,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 06:55:26,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:26,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:55:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-09-25 06:55:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 06:55:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:26,712 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 06:55:26,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:26,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:26,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 06:55:26,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:26,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 06:55:26,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:26,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:26,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:27,119 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 06:55:27,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988833983] [2020-09-25 06:55:27,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:27,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:55:27,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614190883] [2020-09-25 06:55:27,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:55:27,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:27,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:55:27,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:55:27,122 INFO L87 Difference]: Start difference. First operand 2236 states and 2703 transitions. Second operand 5 states. [2020-09-25 06:55:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:34,126 INFO L93 Difference]: Finished difference Result 6157 states and 7488 transitions. [2020-09-25 06:55:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:55:34,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-09-25 06:55:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:34,147 INFO L225 Difference]: With dead ends: 6157 [2020-09-25 06:55:34,147 INFO L226 Difference]: Without dead ends: 4143 [2020-09-25 06:55:34,152 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 06:55:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2020-09-25 06:55:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4030. [2020-09-25 06:55:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4030 states. [2020-09-25 06:55:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 4890 transitions. [2020-09-25 06:55:34,316 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 4890 transitions. Word has length 424 [2020-09-25 06:55:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:34,317 INFO L479 AbstractCegarLoop]: Abstraction has 4030 states and 4890 transitions. [2020-09-25 06:55:34,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:55:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 4890 transitions. [2020-09-25 06:55:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-25 06:55:34,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:34,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:55:34,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:55:34,335 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1336613739, now seen corresponding path program 1 times [2020-09-25 06:55:34,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:34,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082285365] [2020-09-25 06:55:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:34,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:34,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:35,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:37,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:37,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:38,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:38,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking...