/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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:27:28,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:27:28,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:27:28,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:27:28,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:27:28,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:27:28,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:27:28,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:27:28,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:27:28,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:27:28,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:27:28,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:27:28,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:27:28,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:27:28,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:27:28,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:27:28,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:27:28,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:27:28,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:27:28,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:27:28,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:27:28,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:27:28,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:27:28,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:27:28,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:27:28,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:27:28,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:27:28,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:27:28,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:27:28,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:27:28,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:27:28,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:27:28,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:27:28,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:27:28,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:27:28,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:27:28,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:27:28,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:27:28,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:27:28,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:27:28,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:27:28,200 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 11:27:28,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:27:28,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:27:28,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:27:28,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:27:28,230 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:27:28,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:27:28,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:27:28,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:27:28,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:27:28,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:27:28,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:27:28,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:27:28,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:27:28,232 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:27:28,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:27:28,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:27:28,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:27:28,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:27:28,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:27:28,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:27:28,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:27:28,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:27:28,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:27:28,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:27:28,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:27:28,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:27:28,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:27:28,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:27:28,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:27:28,235 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 11:27:28,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:27:28,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:27:28,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:27:28,739 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:27:28,739 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:27:28,741 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:28,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e7dc8d82/e7fa29a95f924ae3b7cce81e1699db4c/FLAG32dd59c58 [2020-09-25 11:27:29,478 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:27:29,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:29,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e7dc8d82/e7fa29a95f924ae3b7cce81e1699db4c/FLAG32dd59c58 [2020-09-25 11:27:29,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e7dc8d82/e7fa29a95f924ae3b7cce81e1699db4c [2020-09-25 11:27:29,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:27:29,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:27:29,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:29,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:27:29,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:27:29,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:29" (1/1) ... [2020-09-25 11:27:29,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f389357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:29, skipping insertion in model container [2020-09-25 11:27:29,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:29" (1/1) ... [2020-09-25 11:27:29,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:27:29,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:27:30,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:30,504 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:27:30,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:30,713 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:27:30,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30 WrapperNode [2020-09-25 11:27:30,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:30,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:27:30,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:27:30,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:27:30,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (1/1) ... [2020-09-25 11:27:30,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (1/1) ... [2020-09-25 11:27:30,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (1/1) ... [2020-09-25 11:27:30,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (1/1) ... [2020-09-25 11:27:30,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (1/1) ... [2020-09-25 11:27:30,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (1/1) ... [2020-09-25 11:27:30,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (1/1) ... [2020-09-25 11:27:30,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:27:30,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:27:30,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:27:30,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:27:30,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (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 11:27:30,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:27:30,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:27:30,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:27:30,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:27:30,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:27:30,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 11:27:30,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 11:27:30,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 11:27:30,923 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 11:27:30,923 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:27:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:27:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 11:27:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 11:27:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 11:27:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 11:27:30,925 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 11:27:30,925 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 11:27:30,925 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 11:27:30,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:27:30,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:27:30,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:27:32,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:27:32,760 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:27:32,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:32 BoogieIcfgContainer [2020-09-25 11:27:32,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:27:32,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:27:32,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:27:32,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:27:32,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:27:29" (1/3) ... [2020-09-25 11:27:32,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a89a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:32, skipping insertion in model container [2020-09-25 11:27:32,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:30" (2/3) ... [2020-09-25 11:27:32,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a89a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:32, skipping insertion in model container [2020-09-25 11:27:32,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:32" (3/3) ... [2020-09-25 11:27:32,802 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:32,816 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:27:32,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:27:32,856 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:27:32,901 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:27:32,901 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:27:32,902 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:27:32,902 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:27:32,902 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:27:32,902 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:27:32,902 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:27:32,903 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:27:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-25 11:27:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 11:27:33,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:33,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:33,006 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:33,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-25 11:27:33,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:33,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889417484] [2020-09-25 11:27:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:33,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:38,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:38,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:38,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:38,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 11:27:38,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:27:38,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-09-25 11:27:38,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:38,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:27:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-25 11:27:38,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 11:27:38,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:27:39,414 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 11:27:39,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:39,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:39,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 11:27:39,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:39,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-25 11:27:39,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:39,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:39,987 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 11:27:39,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889417484] [2020-09-25 11:27:39,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:39,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:27:39,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549914641] [2020-09-25 11:27:40,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:27:40,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:40,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:27:40,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:27:40,038 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-25 11:27:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:43,875 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-25 11:27:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:27:43,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 11:27:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:43,916 INFO L225 Difference]: With dead ends: 1657 [2020-09-25 11:27:43,916 INFO L226 Difference]: Without dead ends: 1241 [2020-09-25 11:27:43,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:27:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-25 11:27:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-25 11:27:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-25 11:27:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-25 11:27:44,086 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-25 11:27:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:44,088 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-25 11:27:44,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:27:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-25 11:27:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 11:27:44,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:44,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:44,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:27:44,100 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-25 11:27:44,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:44,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607790465] [2020-09-25 11:27:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:44,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:44,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:44,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:44,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:45,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:45,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:48,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:49,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:49,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 11:27:49,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:27:49,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 11:27:49,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:49,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:27:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-25 11:27:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 11:27:49,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-09-25 11:27:49,777 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 11:27:49,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:49,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:49,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:49,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 11:27:49,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 11:27:49,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:49,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:49,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:50,166 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 11:27:50,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607790465] [2020-09-25 11:27:50,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:50,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:27:50,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637664002] [2020-09-25 11:27:50,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:27:50,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:50,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:27:50,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:27:50,174 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-25 11:27:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:53,267 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-25 11:27:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:27:53,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 11:27:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:53,284 INFO L225 Difference]: With dead ends: 2498 [2020-09-25 11:27:53,284 INFO L226 Difference]: Without dead ends: 2052 [2020-09-25 11:27:53,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:27:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-25 11:27:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-25 11:27:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-25 11:27:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-25 11:27:53,389 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-25 11:27:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:53,390 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-25 11:27:53,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:27:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-25 11:27:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 11:27:53,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:53,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:53,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:27:53,413 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-25 11:27:53,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:53,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307766452] [2020-09-25 11:27:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:53,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:53,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:54,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:54,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:55,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:55,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:58,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:58,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 11:27:58,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:27:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-25 11:27:58,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:58,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:27:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-09-25 11:27:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-25 11:27:58,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:59,142 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 11:27:59,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:59,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:59,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:59,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 11:27:59,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:59,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 11:27:59,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:59,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:59,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:59,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:59,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:59,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:59,453 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 11:27:59,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307766452] [2020-09-25 11:27:59,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:59,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:27:59,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815473159] [2020-09-25 11:27:59,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:27:59,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:27:59,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:27:59,457 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-25 11:28:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:03,971 INFO L93 Difference]: Finished difference Result 5618 states and 7065 transitions. [2020-09-25 11:28:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:28:03,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-25 11:28:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:03,992 INFO L225 Difference]: With dead ends: 5618 [2020-09-25 11:28:03,992 INFO L226 Difference]: Without dead ends: 3778 [2020-09-25 11:28:03,997 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 11:28:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2020-09-25 11:28:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3776. [2020-09-25 11:28:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3776 states. [2020-09-25 11:28:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 4713 transitions. [2020-09-25 11:28:04,127 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 4713 transitions. Word has length 449 [2020-09-25 11:28:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:04,129 INFO L479 AbstractCegarLoop]: Abstraction has 3776 states and 4713 transitions. [2020-09-25 11:28:04,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:28:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 4713 transitions. [2020-09-25 11:28:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-25 11:28:04,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:04,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:28:04,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:28:04,146 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:04,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1493609028, now seen corresponding path program 1 times [2020-09-25 11:28:04,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:04,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423921592] [2020-09-25 11:28:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:04,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:04,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:04,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:04,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:05,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:06,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:09,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:09,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-25 11:28:09,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:28:09,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-09-25 11:28:09,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:09,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:09,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:28:09,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-09-25 11:28:09,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 11:28:09,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:09,766 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 11:28:09,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:09,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:09,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:09,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 11:28:09,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:09,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 11:28:09,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:09,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:09,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:09,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:09,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:09,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:10,001 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 11:28:10,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423921592] [2020-09-25 11:28:10,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:10,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:28:10,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674450776] [2020-09-25 11:28:10,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:28:10,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:28:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:28:10,005 INFO L87 Difference]: Start difference. First operand 3776 states and 4713 transitions. Second operand 5 states. [2020-09-25 11:28:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:15,459 INFO L93 Difference]: Finished difference Result 9957 states and 12464 transitions. [2020-09-25 11:28:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:28:15,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 450 [2020-09-25 11:28:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:15,490 INFO L225 Difference]: With dead ends: 9957 [2020-09-25 11:28:15,490 INFO L226 Difference]: Without dead ends: 6399 [2020-09-25 11:28:15,500 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 11:28:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6399 states. [2020-09-25 11:28:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6399 to 6397. [2020-09-25 11:28:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6397 states. [2020-09-25 11:28:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6397 states to 6397 states and 7950 transitions. [2020-09-25 11:28:15,744 INFO L78 Accepts]: Start accepts. Automaton has 6397 states and 7950 transitions. Word has length 450 [2020-09-25 11:28:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:15,745 INFO L479 AbstractCegarLoop]: Abstraction has 6397 states and 7950 transitions. [2020-09-25 11:28:15,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:28:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 6397 states and 7950 transitions. [2020-09-25 11:28:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-25 11:28:15,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:15,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:28:15,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:28:15,764 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1539230351, now seen corresponding path program 1 times [2020-09-25 11:28:15,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:15,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683566726] [2020-09-25 11:28:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:15,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:16,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:16,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:16,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:16,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:16,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking...