/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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:38:25,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:38:25,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:38:25,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:38:25,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:38:25,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:38:25,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:38:25,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:38:25,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:38:25,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:38:25,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:38:25,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:38:25,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:38:25,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:38:25,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:38:25,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:38:25,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:38:25,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:38:25,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:38:25,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:38:25,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:38:25,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:38:25,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:38:25,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:38:25,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:38:25,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:38:25,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:38:25,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:38:25,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:38:25,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:38:25,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:38:25,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:38:25,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:38:25,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:38:25,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:38:25,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:38:25,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:38:25,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:38:25,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:38:25,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:38:25,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:38:25,132 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 12:38:25,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:38:25,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:38:25,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:38:25,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:38:25,192 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:38:25,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:38:25,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:38:25,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:38:25,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:38:25,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:38:25,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:38:25,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:38:25,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:38:25,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:38:25,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:38:25,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:38:25,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:38:25,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:38:25,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:38:25,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:38:25,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:38:25,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:38:25,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:38:25,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:38:25,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:38:25,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:38:25,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:38:25,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:38:25,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:38:25,200 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 12:38:25,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:38:25,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:38:25,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:38:25,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:38:25,681 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:38:25,683 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 12:38:25,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f76b063cb/cffb22ed7ab64d80aa9138f9471edf27/FLAGca1b86628 [2020-09-21 12:38:26,518 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:38:26,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 12:38:26,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f76b063cb/cffb22ed7ab64d80aa9138f9471edf27/FLAGca1b86628 [2020-09-21 12:38:26,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f76b063cb/cffb22ed7ab64d80aa9138f9471edf27 [2020-09-21 12:38:26,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:38:26,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:38:26,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:26,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:38:26,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:38:26,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:26" (1/1) ... [2020-09-21 12:38:26,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f6f65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:26, skipping insertion in model container [2020-09-21 12:38:26,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:26" (1/1) ... [2020-09-21 12:38:26,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:38:26,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:38:28,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:38:28,364 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:38:29,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:38:29,835 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:38:29,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29 WrapperNode [2020-09-21 12:38:29,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:29,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:38:29,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:38:29,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:38:29,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2020-09-21 12:38:29,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2020-09-21 12:38:29,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2020-09-21 12:38:29,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2020-09-21 12:38:30,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2020-09-21 12:38:30,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2020-09-21 12:38:30,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2020-09-21 12:38:30,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:38:30,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:38:30,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:38:30,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:38:30,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (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 12:38:30,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:38:30,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:38:30,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:38:30,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:38:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:38:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:38:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:38:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:38:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:38:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:38:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:38:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:38:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:38:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:38:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:38:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:38:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:38:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 12:38:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:38:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:38:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:38:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:38:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:38:34,304 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:38:34,305 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:38:34,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:34 BoogieIcfgContainer [2020-09-21 12:38:34,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:38:34,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:38:34,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:38:34,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:38:34,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:38:26" (1/3) ... [2020-09-21 12:38:34,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1721ee29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:34, skipping insertion in model container [2020-09-21 12:38:34,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (2/3) ... [2020-09-21 12:38:34,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1721ee29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:34, skipping insertion in model container [2020-09-21 12:38:34,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:34" (3/3) ... [2020-09-21 12:38:34,336 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 12:38:34,346 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:38:34,357 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-21 12:38:34,379 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-21 12:38:34,415 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:38:34,415 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:38:34,415 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:38:34,415 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:38:34,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:38:34,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:38:34,416 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:38:34,416 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:38:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-09-21 12:38:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-09-21 12:38:34,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:34,508 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] [2020-09-21 12:38:34,509 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-09-21 12:38:34,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:34,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833966710] [2020-09-21 12:38:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:38,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:38,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 480 [2020-09-21 12:38:38,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:38,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-09-21 12:38:38,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:38,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:38:38,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:38:38,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-09-21 12:38:38,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:38:40,528 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 385 [2020-09-21 12:38:40,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:40,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:40,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:40,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:40,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:40,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-21 12:38:40,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:40,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:40,977 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 12:38:40,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833966710] [2020-09-21 12:38:40,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:40,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:38:40,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678467194] [2020-09-21 12:38:40,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:38:40,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:38:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:41,011 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 5 states. [2020-09-21 12:38:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:57,822 INFO L93 Difference]: Finished difference Result 4061 states and 7346 transitions. [2020-09-21 12:38:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:38:57,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-09-21 12:38:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:57,879 INFO L225 Difference]: With dead ends: 4061 [2020-09-21 12:38:57,879 INFO L226 Difference]: Without dead ends: 2719 [2020-09-21 12:38:57,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:38:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2020-09-21 12:38:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2692. [2020-09-21 12:38:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2692 states. [2020-09-21 12:38:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4402 transitions. [2020-09-21 12:38:58,194 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4402 transitions. Word has length 473 [2020-09-21 12:38:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:58,201 INFO L479 AbstractCegarLoop]: Abstraction has 2692 states and 4402 transitions. [2020-09-21 12:38:58,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:38:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4402 transitions. [2020-09-21 12:38:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-09-21 12:38:58,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:58,236 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] [2020-09-21 12:38:58,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:38:58,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 747099372, now seen corresponding path program 1 times [2020-09-21 12:38:58,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:58,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51569829] [2020-09-21 12:38:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:59,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:59,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:59,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 482 [2020-09-21 12:38:59,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:38:59,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1164 [2020-09-21 12:38:59,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-09-21 12:38:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-09-21 12:38:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 12:39:01,296 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 385 [2020-09-21 12:39:01,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:01,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:01,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:01,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:01,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:01,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 12:39:01,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:01,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:01,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:01,841 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 12:39:01,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51569829] [2020-09-21 12:39:01,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:01,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:01,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833059322] [2020-09-21 12:39:01,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:01,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:01,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:01,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:01,846 INFO L87 Difference]: Start difference. First operand 2692 states and 4402 transitions. Second operand 4 states. [2020-09-21 12:39:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:19,665 INFO L93 Difference]: Finished difference Result 7789 states and 12695 transitions. [2020-09-21 12:39:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:19,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-09-21 12:39:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:19,694 INFO L225 Difference]: With dead ends: 7789 [2020-09-21 12:39:19,694 INFO L226 Difference]: Without dead ends: 5249 [2020-09-21 12:39:19,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2020-09-21 12:39:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 5215. [2020-09-21 12:39:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5215 states. [2020-09-21 12:39:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 8486 transitions. [2020-09-21 12:39:19,906 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 8486 transitions. Word has length 475 [2020-09-21 12:39:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:19,908 INFO L479 AbstractCegarLoop]: Abstraction has 5215 states and 8486 transitions. [2020-09-21 12:39:19,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 8486 transitions. [2020-09-21 12:39:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-21 12:39:19,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:19,927 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] [2020-09-21 12:39:19,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:19,928 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1525887709, now seen corresponding path program 1 times [2020-09-21 12:39:19,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:19,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163502599] [2020-09-21 12:39:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:20,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking...