/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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:42:35,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:42:35,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:42:35,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:42:35,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:42:35,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:42:35,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:42:35,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:42:35,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:42:35,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:42:35,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:42:35,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:42:35,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:42:35,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:42:35,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:42:35,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:42:35,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:42:35,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:42:35,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:42:35,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:42:35,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:42:35,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:42:35,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:42:35,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:42:35,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:42:35,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:42:35,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:42:35,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:42:35,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:42:35,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:42:35,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:42:35,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:42:35,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:42:35,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:42:35,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:42:35,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:42:35,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:42:35,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:42:35,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:42:35,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:42:35,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:42:35,321 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 13:42:35,356 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:42:35,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:42:35,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:42:35,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:42:35,362 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:42:35,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:42:35,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:42:35,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:42:35,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:42:35,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:42:35,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:42:35,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:42:35,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:42:35,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:42:35,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:42:35,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:42:35,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:42:35,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:42:35,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:42:35,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:42:35,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:42:35,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:42:35,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:42:35,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:42:35,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:42:35,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:42:35,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:42:35,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:42:35,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:42:35,367 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 13:42:35,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:42:35,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:42:35,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:42:35,890 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:42:35,890 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:42:35,891 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 13:42:35,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52d159c32/51a5db9ac85341e6ba4d64a2d826ec0d/FLAGc18a6d8cc [2020-09-25 13:42:36,709 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:42:36,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 13:42:36,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52d159c32/51a5db9ac85341e6ba4d64a2d826ec0d/FLAGc18a6d8cc [2020-09-25 13:42:36,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52d159c32/51a5db9ac85341e6ba4d64a2d826ec0d [2020-09-25 13:42:36,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:42:36,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:42:36,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:42:36,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:42:36,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:42:36,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:42:36" (1/1) ... [2020-09-25 13:42:36,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dffe24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:36, skipping insertion in model container [2020-09-25 13:42:36,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:42:36" (1/1) ... [2020-09-25 13:42:36,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:42:37,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:42:38,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:42:38,297 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:42:38,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:42:38,842 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:42:38,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38 WrapperNode [2020-09-25 13:42:38,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:42:38,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:42:38,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:42:38,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:42:38,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (1/1) ... [2020-09-25 13:42:38,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (1/1) ... [2020-09-25 13:42:38,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (1/1) ... [2020-09-25 13:42:38,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (1/1) ... [2020-09-25 13:42:38,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (1/1) ... [2020-09-25 13:42:39,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (1/1) ... [2020-09-25 13:42:39,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (1/1) ... [2020-09-25 13:42:39,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:42:39,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:42:39,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:42:39,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:42:39,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (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 13:42:39,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:42:39,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:42:39,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:42:39,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:42:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:42:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 13:42:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 13:42:39,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 13:42:39,144 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 13:42:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:42:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:42:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 13:42:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 13:42:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 13:42:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 13:42:39,146 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 13:42:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 13:42:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 13:42:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 13:42:39,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:42:39,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:42:39,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:42:42,455 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:42:42,456 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:42:42,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:42:42 BoogieIcfgContainer [2020-09-25 13:42:42,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:42:42,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:42:42,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:42:42,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:42:42,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:42:36" (1/3) ... [2020-09-25 13:42:42,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76549131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:42:42, skipping insertion in model container [2020-09-25 13:42:42,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:38" (2/3) ... [2020-09-25 13:42:42,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76549131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:42:42, skipping insertion in model container [2020-09-25 13:42:42,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:42:42" (3/3) ... [2020-09-25 13:42:42,491 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 13:42:42,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:42:42,522 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:42:42,544 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:42:42,589 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:42:42,589 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:42:42,589 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:42:42,589 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:42:42,590 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:42:42,590 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:42:42,590 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:42:42,590 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:42:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-25 13:42:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 13:42:42,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:42,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:42:42,732 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:42,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2948384, now seen corresponding path program 1 times [2020-09-25 13:42:42,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:42,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044165767] [2020-09-25 13:42:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:44,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:45,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:45,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:46,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:46,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:47,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:47,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:48,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:48,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:48,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 13:42:48,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 13:42:48,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-09-25 13:42:48,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:48,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:42:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 378 [2020-09-25 13:42:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 500 [2020-09-25 13:42:48,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 13:42:50,703 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 13:42:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:50,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:50,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:50,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 13:42:50,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:50,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-25 13:42:50,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:50,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:50,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:50,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:50,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:52,375 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 13:42:52,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044165767] [2020-09-25 13:42:52,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:52,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:42:52,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541837289] [2020-09-25 13:42:52,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:42:52,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:52,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:42:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:52,415 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 4 states. [2020-09-25 13:43:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:43:02,065 INFO L93 Difference]: Finished difference Result 3387 states and 4474 transitions. [2020-09-25 13:43:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:43:02,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 908 [2020-09-25 13:43:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:43:02,114 INFO L225 Difference]: With dead ends: 3387 [2020-09-25 13:43:02,114 INFO L226 Difference]: Without dead ends: 2783 [2020-09-25 13:43:02,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:43:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-09-25 13:43:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2770. [2020-09-25 13:43:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-09-25 13:43:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3483 transitions. [2020-09-25 13:43:02,329 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3483 transitions. Word has length 908 [2020-09-25 13:43:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:43:02,332 INFO L479 AbstractCegarLoop]: Abstraction has 2770 states and 3483 transitions. [2020-09-25 13:43:02,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:43:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3483 transitions. [2020-09-25 13:43:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 13:43:02,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:43:02,431 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:43:02,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:43:02,432 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:43:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:43:02,433 INFO L82 PathProgramCache]: Analyzing trace with hash -4225536, now seen corresponding path program 1 times [2020-09-25 13:43:02,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:43:02,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285126958] [2020-09-25 13:43:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:43:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:03,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:03,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:04,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:04,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:05,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:05,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:05,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:06,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:07,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:07,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 13:43:07,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 13:43:07,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-09-25 13:43:07,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:07,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:43:07,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 278 [2020-09-25 13:43:07,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-09-25 13:43:07,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 17 [2020-09-25 13:43:09,271 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 13:43:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:43:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:09,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:09,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:09,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 13:43:09,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:43:09,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 13:43:09,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:09,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:43:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:43:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:43:09,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:43:10,298 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 13:43:10,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285126958] [2020-09-25 13:43:10,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:43:10,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:43:10,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014937554] [2020-09-25 13:43:10,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:43:10,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:43:10,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:43:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:43:10,304 INFO L87 Difference]: Start difference. First operand 2770 states and 3483 transitions. Second operand 5 states. [2020-09-25 13:43:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:43:24,747 INFO L93 Difference]: Finished difference Result 7600 states and 9684 transitions. [2020-09-25 13:43:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:43:24,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 908 [2020-09-25 13:43:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:43:24,779 INFO L225 Difference]: With dead ends: 7600 [2020-09-25 13:43:24,779 INFO L226 Difference]: Without dead ends: 5161 [2020-09-25 13:43:24,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:43:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2020-09-25 13:43:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 5159. [2020-09-25 13:43:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5159 states. [2020-09-25 13:43:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 6536 transitions. [2020-09-25 13:43:25,032 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 6536 transitions. Word has length 908 [2020-09-25 13:43:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:43:25,033 INFO L479 AbstractCegarLoop]: Abstraction has 5159 states and 6536 transitions. [2020-09-25 13:43:25,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:43:25,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 6536 transitions. [2020-09-25 13:43:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2020-09-25 13:43:25,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:43:25,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:43:25,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:43:25,110 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:43:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:43:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1299069350, now seen corresponding path program 1 times [2020-09-25 13:43:25,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:43:25,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019706629] [2020-09-25 13:43:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:43:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:25,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:25,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:25,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking...