/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:39:20,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:39:20,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:39:20,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:39:20,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:39:20,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:39:20,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:39:20,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:39:20,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:39:20,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:39:20,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:39:20,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:39:20,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:39:20,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:39:20,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:39:20,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:39:20,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:39:20,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:39:20,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:39:20,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:39:20,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:39:20,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:39:20,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:39:20,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:39:20,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:39:20,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:39:20,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:39:20,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:39:20,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:39:20,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:39:20,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:39:20,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:39:20,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:39:20,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:39:20,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:39:20,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:39:20,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:39:20,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:39:20,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:39:20,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:39:20,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:39:20,254 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 [2020-09-21 12:39:20,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:39:20,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:39:20,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:39:20,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:39:20,302 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:39:20,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:39:20,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:39:20,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:39:20,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:39:20,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:39:20,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:39:20,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:39:20,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:39:20,305 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:39:20,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:39:20,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:39:20,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:39:20,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:39:20,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:39:20,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:39:20,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:39:20,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:39:20,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:39:20,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:39:20,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:39:20,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:39:20,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:39:20,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:39:20,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:39:20,309 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:39:20,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:39:20,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:39:20,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:39:20,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:39:20,823 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:39:20,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 12:39:20,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3fe9e3590/ea8819e3c3da4e2fb5464e63b4f340d4/FLAGd92df506a [2020-09-21 12:39:21,622 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:39:21,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 12:39:21,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3fe9e3590/ea8819e3c3da4e2fb5464e63b4f340d4/FLAGd92df506a [2020-09-21 12:39:21,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3fe9e3590/ea8819e3c3da4e2fb5464e63b4f340d4 [2020-09-21 12:39:21,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:39:21,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:39:21,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:21,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:39:21,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:39:21,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:21" (1/1) ... [2020-09-21 12:39:21,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2876d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:21, skipping insertion in model container [2020-09-21 12:39:21,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:21" (1/1) ... [2020-09-21 12:39:21,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:39:22,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:39:23,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:23,077 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:23,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:23,616 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:23,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23 WrapperNode [2020-09-21 12:39:23,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:23,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:23,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:23,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:23,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:23,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:23,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:23,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:23,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (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 [2020-09-21 12:39:23,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:23,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:23,910 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:23,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:23,913 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:39:23,913 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:23,913 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:23,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:26,827 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:26,827 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:26,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:26 BoogieIcfgContainer [2020-09-21 12:39:26,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:26,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:26,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:26,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:26,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:39:21" (1/3) ... [2020-09-21 12:39:26,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da07c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:26, skipping insertion in model container [2020-09-21 12:39:26,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23" (2/3) ... [2020-09-21 12:39:26,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da07c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:26, skipping insertion in model container [2020-09-21 12:39:26,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:26" (3/3) ... [2020-09-21 12:39:26,848 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 12:39:26,861 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:26,872 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:39:26,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:39:26,930 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:26,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:26,931 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:26,931 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:26,931 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:26,931 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:26,931 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:26,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-09-21 12:39:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-21 12:39:26,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:27,001 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] [2020-09-21 12:39:27,002 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-09-21 12:39:27,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:27,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364192884] [2020-09-21 12:39:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:29,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:29,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:29,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-09-21 12:39:29,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:29,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1235 [2020-09-21 12:39:29,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:29,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:29,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:29,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-21 12:39:29,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:39:30,864 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:39:30,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:30,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:30,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:30,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:30,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:30,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 12:39:30,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:30,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:30,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:30,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:30,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:31,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364192884] [2020-09-21 12:39:31,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:31,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:31,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349917990] [2020-09-21 12:39:31,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:31,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:31,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:31,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:31,187 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-09-21 12:39:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:40,875 INFO L93 Difference]: Finished difference Result 2297 states and 4081 transitions. [2020-09-21 12:39:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:39:40,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-09-21 12:39:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:40,914 INFO L225 Difference]: With dead ends: 2297 [2020-09-21 12:39:40,914 INFO L226 Difference]: Without dead ends: 1545 [2020-09-21 12:39:40,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-21 12:39:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-09-21 12:39:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-21 12:39:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2403 transitions. [2020-09-21 12:39:41,105 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2403 transitions. Word has length 324 [2020-09-21 12:39:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:41,106 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2403 transitions. [2020-09-21 12:39:41,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2403 transitions. [2020-09-21 12:39:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:41,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:41,113 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] [2020-09-21 12:39:41,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:41,114 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-09-21 12:39:41,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:41,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080332528] [2020-09-21 12:39:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:41,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:42,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:42,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:42,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:42,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:39:42,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1498 [2020-09-21 12:39:42,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:39:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-21 12:39:42,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:43,486 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:39:43,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:43,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:43,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:43,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:43,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:43,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-21 12:39:43,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:43,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:43,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:43,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080332528] [2020-09-21 12:39:43,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:43,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:43,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042638138] [2020-09-21 12:39:43,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:43,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:43,851 INFO L87 Difference]: Start difference. First operand 1543 states and 2403 transitions. Second operand 4 states. [2020-09-21 12:39:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:53,526 INFO L93 Difference]: Finished difference Result 4438 states and 6878 transitions. [2020-09-21 12:39:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:53,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 12:39:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:53,543 INFO L225 Difference]: With dead ends: 4438 [2020-09-21 12:39:53,544 INFO L226 Difference]: Without dead ends: 3024 [2020-09-21 12:39:53,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-09-21 12:39:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-09-21 12:39:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-09-21 12:39:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4682 transitions. [2020-09-21 12:39:53,700 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4682 transitions. Word has length 326 [2020-09-21 12:39:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:53,702 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4682 transitions. [2020-09-21 12:39:53,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4682 transitions. [2020-09-21 12:39:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:53,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:53,711 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] [2020-09-21 12:39:53,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:53,712 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-09-21 12:39:53,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:53,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491165997] [2020-09-21 12:39:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:53,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:54,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:54,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:54,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:54,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:39:54,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-09-21 12:39:54,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:54,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:54,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:39:54,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:39:54,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:39:55,670 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:39:55,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:55,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:55,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:55,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:55,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:55,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 12:39:55,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:55,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:55,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491165997] [2020-09-21 12:39:55,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:55,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:55,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815605543] [2020-09-21 12:39:55,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:55,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:55,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:55,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:55,837 INFO L87 Difference]: Start difference. First operand 3022 states and 4682 transitions. Second operand 4 states. [2020-09-21 12:40:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:40:05,027 INFO L93 Difference]: Finished difference Result 8989 states and 13911 transitions. [2020-09-21 12:40:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:40:05,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 12:40:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:40:05,078 INFO L225 Difference]: With dead ends: 8989 [2020-09-21 12:40:05,078 INFO L226 Difference]: Without dead ends: 6006 [2020-09-21 12:40:05,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:40:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2020-09-21 12:40:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 3036. [2020-09-21 12:40:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3036 states. [2020-09-21 12:40:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 4699 transitions. [2020-09-21 12:40:05,277 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 4699 transitions. Word has length 326 [2020-09-21 12:40:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:40:05,277 INFO L479 AbstractCegarLoop]: Abstraction has 3036 states and 4699 transitions. [2020-09-21 12:40:05,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:40:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 4699 transitions. [2020-09-21 12:40:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 12:40:05,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:40:05,289 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] [2020-09-21 12:40:05,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:40:05,290 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:40:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:40:05,290 INFO L82 PathProgramCache]: Analyzing trace with hash -596388882, now seen corresponding path program 1 times [2020-09-21 12:40:05,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:40:05,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378629997] [2020-09-21 12:40:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:40:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:05,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:05,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:06,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:06,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:06,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-21 12:40:06,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:40:06,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-09-21 12:40:06,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:06,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:40:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:40:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:40:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:40:07,081 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:40:07,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:40:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:07,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:07,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:07,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:40:07,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:40:07,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:40:07,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:40:07,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:40:07,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:40:07,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:40:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:40:07,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378629997] [2020-09-21 12:40:07,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:40:07,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:40:07,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237655469] [2020-09-21 12:40:07,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:40:07,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:40:07,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:40:07,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:40:07,291 INFO L87 Difference]: Start difference. First operand 3036 states and 4699 transitions. Second operand 4 states.