/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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:27:27,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:27:27,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:27:27,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:27:27,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:27:27,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:27:27,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:27:27,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:27:27,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:27:27,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:27:27,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:27:27,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:27:27,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:27:27,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:27:27,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:27:27,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:27:27,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:27:27,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:27:27,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:27:27,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:27:27,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:27:27,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:27:27,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:27:28,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:27:28,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:27:28,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:27:28,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:27:28,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:27:28,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:27:28,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:27:28,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:27:28,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:27:28,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:27:28,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:27:28,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:27:28,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:27:28,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:27:28,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:27:28,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:27:28,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:27:28,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:27:28,015 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 11:27:28,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:27:28,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:27:28,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:27:28,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:27:28,045 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:27:28,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:27:28,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:27:28,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:27:28,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:27:28,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:27:28,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:27:28,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:27:28,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:27:28,047 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:27:28,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:27:28,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:27:28,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:27:28,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:27:28,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:27:28,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:27:28,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:27:28,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:27:28,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:27:28,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:27:28,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:27:28,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:27:28,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:27:28,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:27:28,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:27:28,050 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 11:27:28,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:27:28,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:27:28,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:27:28,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:27:28,581 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:27:28,582 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 11:27:28,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b381f0b43/aa1db3ebb6754461af1a0068e6cfca12/FLAG926a44db5 [2020-09-25 11:27:29,347 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:27:29,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 11:27:29,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b381f0b43/aa1db3ebb6754461af1a0068e6cfca12/FLAG926a44db5 [2020-09-25 11:27:29,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b381f0b43/aa1db3ebb6754461af1a0068e6cfca12 [2020-09-25 11:27:29,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:27:29,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:27:29,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:29,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:27:29,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:27:29,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:29" (1/1) ... [2020-09-25 11:27:29,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba61646 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 11:27:29,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:29" (1/1) ... [2020-09-25 11:27:29,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:27:29,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:27:30,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:30,481 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:27:31,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:31,063 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:27:31,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31 WrapperNode [2020-09-25 11:27:31,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:31,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:27:31,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:27:31,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:27:31,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (1/1) ... [2020-09-25 11:27:31,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (1/1) ... [2020-09-25 11:27:31,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (1/1) ... [2020-09-25 11:27:31,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (1/1) ... [2020-09-25 11:27:31,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (1/1) ... [2020-09-25 11:27:31,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (1/1) ... [2020-09-25 11:27:31,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (1/1) ... [2020-09-25 11:27:31,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:27:31,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:27:31,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:27:31,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:27:31,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (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 11:27:31,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:27:31,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:27:31,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:27:31,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 11:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 11:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 11:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 11:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 11:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 11:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 11:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 11:27:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 11:27:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 11:27:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 11:27:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:27:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:27:31,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:27:33,495 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:27:33,496 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:27:33,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:33 BoogieIcfgContainer [2020-09-25 11:27:33,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:27:33,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:27:33,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:27:33,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:27:33,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:27:29" (1/3) ... [2020-09-25 11:27:33,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414b389b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:33, skipping insertion in model container [2020-09-25 11:27:33,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:31" (2/3) ... [2020-09-25 11:27:33,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414b389b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:33, skipping insertion in model container [2020-09-25 11:27:33,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:33" (3/3) ... [2020-09-25 11:27:33,542 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 11:27:33,556 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:27:33,573 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 11:27:33,596 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 11:27:33,640 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:27:33,641 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:27:33,641 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:27:33,641 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:27:33,641 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:27:33,641 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:27:33,641 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:27:33,641 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:27:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-25 11:27:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 11:27:33,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:33,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:33,746 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-25 11:27:33,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:33,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273466226] [2020-09-25 11:27:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:36,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:39,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:39,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:39,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 11:27:39,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:27:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 11:27:39,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:39,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:39,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:27:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 11:27:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 11:27:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 11:27:40,084 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 11:27:40,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:40,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:40,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:40,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 11:27:40,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-25 11:27:40,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:40,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:40,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:27:40,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273466226] [2020-09-25 11:27:40,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:40,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:27:40,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668220278] [2020-09-25 11:27:40,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:27:40,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:40,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:27:40,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:27:40,592 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 4 states. [2020-09-25 11:27:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:45,583 INFO L93 Difference]: Finished difference Result 2019 states and 2601 transitions. [2020-09-25 11:27:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:27:45,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 11:27:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:45,624 INFO L225 Difference]: With dead ends: 2019 [2020-09-25 11:27:45,624 INFO L226 Difference]: Without dead ends: 1445 [2020-09-25 11:27:45,632 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 11:27:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-09-25 11:27:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438. [2020-09-25 11:27:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2020-09-25 11:27:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions. [2020-09-25 11:27:45,782 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456 [2020-09-25 11:27:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:45,783 INFO L479 AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions. [2020-09-25 11:27:45,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:27:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions. [2020-09-25 11:27:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 11:27:45,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:45,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:45,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:27:45,797 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:45,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:45,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times [2020-09-25 11:27:45,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:45,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426451307] [2020-09-25 11:27:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:49,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:50,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:50,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 11:27:50,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:27:50,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-09-25 11:27:50,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:50,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:50,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:27:50,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-09-25 11:27:50,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 11:27:50,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:27:51,647 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 11:27:51,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:51,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:51,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:51,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 11:27:51,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 11:27:51,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:51,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:52,179 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 11:27:52,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426451307] [2020-09-25 11:27:52,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:52,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:27:52,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914113139] [2020-09-25 11:27:52,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:27:52,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:27:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:27:52,188 INFO L87 Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states. [2020-09-25 11:27:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:56,419 INFO L93 Difference]: Finished difference Result 2635 states and 3268 transitions. [2020-09-25 11:27:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:27:56,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 11:27:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:56,433 INFO L225 Difference]: With dead ends: 2635 [2020-09-25 11:27:56,433 INFO L226 Difference]: Without dead ends: 2144 [2020-09-25 11:27:56,436 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 11:27:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-09-25 11:27:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132. [2020-09-25 11:27:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2020-09-25 11:27:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions. [2020-09-25 11:27:56,511 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456 [2020-09-25 11:27:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:56,513 INFO L479 AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions. [2020-09-25 11:27:56,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:27:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions. [2020-09-25 11:27:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 11:27:56,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:56,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:56,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:27:56,526 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:56,527 INFO L82 PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times [2020-09-25 11:27:56,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:56,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206026055] [2020-09-25 11:27:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:56,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:57,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:57,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:57,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:57,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:01,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:01,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 11:28:01,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:28:01,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-25 11:28:01,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:01,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:01,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:28:01,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-09-25 11:28:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 11:28:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:02,132 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 11:28:02,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:02,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:02,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 11:28:02,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:02,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-25 11:28:02,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:02,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:02,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:02,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:02,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:02,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:02,502 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 11:28:02,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206026055] [2020-09-25 11:28:02,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:02,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:28:02,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355211126] [2020-09-25 11:28:02,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:28:02,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:02,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:28:02,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:28:02,505 INFO L87 Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states. [2020-09-25 11:28:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:09,289 INFO L93 Difference]: Finished difference Result 5887 states and 7288 transitions. [2020-09-25 11:28:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:28:09,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-25 11:28:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:09,309 INFO L225 Difference]: With dead ends: 5887 [2020-09-25 11:28:09,309 INFO L226 Difference]: Without dead ends: 3958 [2020-09-25 11:28:09,314 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 11:28:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2020-09-25 11:28:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3827. [2020-09-25 11:28:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3827 states. [2020-09-25 11:28:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 4733 transitions. [2020-09-25 11:28:09,440 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 4733 transitions. Word has length 456 [2020-09-25 11:28:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:09,441 INFO L479 AbstractCegarLoop]: Abstraction has 3827 states and 4733 transitions. [2020-09-25 11:28:09,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:28:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 4733 transitions. [2020-09-25 11:28:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-25 11:28:09,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:09,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:28:09,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:28:09,456 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:09,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1610099519, now seen corresponding path program 1 times [2020-09-25 11:28:09,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:09,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453228016] [2020-09-25 11:28:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:09,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:09,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:09,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:14,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:14,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-25 11:28:14,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:28:14,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 11:28:14,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:14,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:28:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-25 11:28:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-09-25 11:28:14,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:28:15,075 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 11:28:15,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:15,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:15,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:15,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 11:28:15,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:15,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 11:28:15,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:15,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:15,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:15,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:15,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:15,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:15,363 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 11:28:15,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453228016] [2020-09-25 11:28:15,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:15,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:28:15,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741335027] [2020-09-25 11:28:15,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:28:15,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:15,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:28:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:28:15,365 INFO L87 Difference]: Start difference. First operand 3827 states and 4733 transitions. Second operand 5 states.