/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=0.4 --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.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:42:29,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:42:29,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:42:29,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:42:29,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:42:29,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:42:29,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:42:29,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:42:29,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:42:29,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:42:29,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:42:29,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:42:29,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:42:29,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:42:29,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:42:29,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:42:29,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:42:29,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:42:29,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:42:29,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:42:29,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:42:29,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:42:29,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:42:29,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:42:29,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:42:29,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:42:29,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:42:29,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:42:29,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:42:29,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:42:29,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:42:29,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:42:29,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:42:29,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:42:29,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:42:29,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:42:29,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:42:29,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:42:29,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:42:29,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:42:29,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:42:29,709 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 13:42:29,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:42:29,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:42:29,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:42:29,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:42:29,757 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:42:29,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:42:29,758 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:42:29,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:42:29,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:42:29,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:42:29,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:42:29,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:42:29,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:42:29,760 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:42:29,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:42:29,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:42:29,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:42:29,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:42:29,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:42:29,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:42:29,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:42:29,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:42:29,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:42:29,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:42:29,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:42:29,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:42:29,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:42:29,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:42:29,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:42:29,763 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 13:42:30,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:42:30,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:42:30,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:42:30,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:42:30,260 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:42:30,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 13:42:30,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b7da8db/c900d7cac29749dcaf5cd9b934dfbe5d/FLAG07fe85e91 [2020-09-25 13:42:31,046 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:42:31,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 13:42:31,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b7da8db/c900d7cac29749dcaf5cd9b934dfbe5d/FLAG07fe85e91 [2020-09-25 13:42:31,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b7da8db/c900d7cac29749dcaf5cd9b934dfbe5d [2020-09-25 13:42:31,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:42:31,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:42:31,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:42:31,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:42:31,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:42:31,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:42:31" (1/1) ... [2020-09-25 13:42:31,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd6f99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:31, skipping insertion in model container [2020-09-25 13:42:31,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:42:31" (1/1) ... [2020-09-25 13:42:31,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:42:31,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:42:32,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:42:32,139 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:42:32,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:42:32,549 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:42:32,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32 WrapperNode [2020-09-25 13:42:32,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:42:32,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:42:32,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:42:32,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:42:32,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (1/1) ... [2020-09-25 13:42:32,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (1/1) ... [2020-09-25 13:42:32,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (1/1) ... [2020-09-25 13:42:32,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (1/1) ... [2020-09-25 13:42:32,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (1/1) ... [2020-09-25 13:42:32,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (1/1) ... [2020-09-25 13:42:32,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (1/1) ... [2020-09-25 13:42:32,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:42:32,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:42:32,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:42:32,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:42:32,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (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 13:42:32,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:42:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:42:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:42:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:42:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:42:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 13:42:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 13:42:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 13:42:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:42:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:42:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 13:42:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 13:42:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 13:42:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 13:42:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 13:42:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 13:42:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 13:42:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:42:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:42:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:42:35,074 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:42:35,075 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:42:35,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:42:35 BoogieIcfgContainer [2020-09-25 13:42:35,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:42:35,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:42:35,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:42:35,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:42:35,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:42:31" (1/3) ... [2020-09-25 13:42:35,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c109347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:42:35, skipping insertion in model container [2020-09-25 13:42:35,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:32" (2/3) ... [2020-09-25 13:42:35,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c109347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:42:35, skipping insertion in model container [2020-09-25 13:42:35,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:42:35" (3/3) ... [2020-09-25 13:42:35,105 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 13:42:35,117 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:42:35,130 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 13:42:35,153 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 13:42:35,193 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:42:35,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:42:35,193 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:42:35,194 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:42:35,194 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:42:35,194 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:42:35,194 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:42:35,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:42:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states. [2020-09-25 13:42:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 13:42:35,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:35,304 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:42:35,305 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:35,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1578062424, now seen corresponding path program 1 times [2020-09-25 13:42:35,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:35,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833687747] [2020-09-25 13:42:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:36,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:36,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:37,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:37,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:38,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:40,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:40,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 13:42:40,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:42:40,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 13:42:40,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:40,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:40,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:42:40,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-09-25 13:42:40,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 13:42:40,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:42:41,495 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 13:42:41,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:41,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:41,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:41,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 13:42:41,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:41,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 13:42:41,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:41,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:41,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:42,049 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 13:42:42,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833687747] [2020-09-25 13:42:42,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:42,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:42:42,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477096745] [2020-09-25 13:42:42,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:42:42,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:42:42,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:42,092 INFO L87 Difference]: Start difference. First operand 1237 states. Second operand 4 states. [2020-09-25 13:42:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:47,526 INFO L93 Difference]: Finished difference Result 2024 states and 2590 transitions. [2020-09-25 13:42:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:42:47,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 465 [2020-09-25 13:42:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:47,568 INFO L225 Difference]: With dead ends: 2024 [2020-09-25 13:42:47,571 INFO L226 Difference]: Without dead ends: 1455 [2020-09-25 13:42:47,588 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 13:42:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-09-25 13:42:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1448. [2020-09-25 13:42:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-09-25 13:42:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1727 transitions. [2020-09-25 13:42:47,742 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1727 transitions. Word has length 465 [2020-09-25 13:42:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:47,747 INFO L479 AbstractCegarLoop]: Abstraction has 1448 states and 1727 transitions. [2020-09-25 13:42:47,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:42:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1727 transitions. [2020-09-25 13:42:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 13:42:47,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:47,764 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:42:47,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:42:47,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 888544568, now seen corresponding path program 1 times [2020-09-25 13:42:47,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:47,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450984914] [2020-09-25 13:42:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:48,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:48,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:48,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:48,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:49,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:52,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:52,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:52,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 13:42:52,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:52,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 13:42:52,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:52,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:52,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:42:52,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-25 13:42:52,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 13:42:52,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:53,475 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 13:42:53,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:53,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:53,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:53,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 13:42:53,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:53,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 13:42:53,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:53,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:53,923 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 13:42:53,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450984914] [2020-09-25 13:42:53,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:53,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:42:53,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876695628] [2020-09-25 13:42:53,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:42:53,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:42:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:42:53,931 INFO L87 Difference]: Start difference. First operand 1448 states and 1727 transitions. Second operand 5 states. [2020-09-25 13:43:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:43:00,700 INFO L93 Difference]: Finished difference Result 3862 states and 4652 transitions. [2020-09-25 13:43:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:43:00,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-09-25 13:43:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:43:00,717 INFO L225 Difference]: With dead ends: 3862 [2020-09-25 13:43:00,717 INFO L226 Difference]: Without dead ends: 2630 [2020-09-25 13:43:00,725 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 13:43:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2020-09-25 13:43:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2503. [2020-09-25 13:43:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2503 states. [2020-09-25 13:43:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3018 transitions. [2020-09-25 13:43:00,836 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3018 transitions. Word has length 465 [2020-09-25 13:43:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:43:00,838 INFO L479 AbstractCegarLoop]: Abstraction has 2503 states and 3018 transitions. [2020-09-25 13:43:00,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:43:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3018 transitions. [2020-09-25 13:43:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-09-25 13:43:00,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:43:00,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:43:00,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:43:00,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:43:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:43:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1155003978, now seen corresponding path program 1 times [2020-09-25 13:43:00,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:43:00,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158187773] [2020-09-25 13:43:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:43:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:01,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:01,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:01,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:02,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:05,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:05,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:05,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:05,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:05,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-09-25 13:43:05,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:43:05,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 13:43:05,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:05,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:05,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:43:05,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 184 [2020-09-25 13:43:05,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-25 13:43:05,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:43:06,501 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 13:43:06,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:43:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 13:43:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:43:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 13:43:06,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:06,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:43:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:43:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:43:06,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:43:06,833 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 13:43:06,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158187773] [2020-09-25 13:43:06,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:43:06,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:43:06,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843357552] [2020-09-25 13:43:06,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:43:06,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:43:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:43:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:43:06,836 INFO L87 Difference]: Start difference. First operand 2503 states and 3018 transitions. Second operand 5 states. [2020-09-25 13:43:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:43:14,110 INFO L93 Difference]: Finished difference Result 6741 states and 8171 transitions. [2020-09-25 13:43:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:43:14,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 466 [2020-09-25 13:43:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:43:14,137 INFO L225 Difference]: With dead ends: 6741 [2020-09-25 13:43:14,137 INFO L226 Difference]: Without dead ends: 4685 [2020-09-25 13:43:14,143 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 13:43:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2020-09-25 13:43:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4558. [2020-09-25 13:43:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4558 states. [2020-09-25 13:43:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4558 states to 4558 states and 5520 transitions. [2020-09-25 13:43:14,309 INFO L78 Accepts]: Start accepts. Automaton has 4558 states and 5520 transitions. Word has length 466 [2020-09-25 13:43:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:43:14,310 INFO L479 AbstractCegarLoop]: Abstraction has 4558 states and 5520 transitions. [2020-09-25 13:43:14,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:43:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4558 states and 5520 transitions. [2020-09-25 13:43:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-25 13:43:14,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:43:14,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:43:14,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:43:14,328 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:43:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:43:14,329 INFO L82 PathProgramCache]: Analyzing trace with hash -717299890, now seen corresponding path program 1 times [2020-09-25 13:43:14,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:43:14,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972821140] [2020-09-25 13:43:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:43:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:14,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:14,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:15,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:15,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:17,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking...