/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=HIGHLEXORDER --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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:59:13,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:59:13,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:59:13,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:59:13,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:59:13,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:59:13,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:59:13,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:59:13,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:59:13,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:59:13,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:59:13,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:59:13,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:59:13,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:59:13,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:59:13,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:59:13,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:59:13,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:59:13,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:59:13,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:59:13,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:59:13,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:59:13,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:59:13,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:59:13,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:59:13,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:59:13,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:59:13,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:59:13,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:59:13,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:59:13,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:59:13,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:59:13,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:59:13,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:59:13,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:59:13,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:59:13,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:59:13,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:59:13,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:59:13,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:59:13,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:59:13,163 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 [2020-09-24 22:59:13,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:59:13,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:59:13,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:59:13,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:59:13,198 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:59:13,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:59:13,198 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:59:13,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:59:13,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:59:13,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:59:13,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:59:13,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:59:13,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:59:13,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:59:13,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:59:13,200 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:59:13,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:59:13,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:59:13,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:59:13,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:59:13,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:59:13,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:59:13,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:59:13,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:59:13,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:59:13,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:59:13,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:59:13,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:59:13,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:59:13,203 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:59:13,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:59:13,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:59:13,688 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:59:13,690 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:59:13,690 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:59:13,691 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:59:13,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7897f5151/99531cdda3544282a11b7c502e3ebf90/FLAG8f26fa8e0 [2020-09-24 22:59:14,543 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:59:14,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:59:14,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7897f5151/99531cdda3544282a11b7c502e3ebf90/FLAG8f26fa8e0 [2020-09-24 22:59:14,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7897f5151/99531cdda3544282a11b7c502e3ebf90 [2020-09-24 22:59:14,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:59:14,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:59:14,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:59:14,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:59:14,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:59:14,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:59:14" (1/1) ... [2020-09-24 22:59:14,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed07bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:14, skipping insertion in model container [2020-09-24 22:59:14,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:59:14" (1/1) ... [2020-09-24 22:59:14,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:59:14,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:59:16,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:59:16,019 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:59:16,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:59:16,581 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:59:16,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16 WrapperNode [2020-09-24 22:59:16,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:59:16,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:59:16,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:59:16,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:59:16,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (1/1) ... [2020-09-24 22:59:16,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (1/1) ... [2020-09-24 22:59:16,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (1/1) ... [2020-09-24 22:59:16,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (1/1) ... [2020-09-24 22:59:16,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (1/1) ... [2020-09-24 22:59:16,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (1/1) ... [2020-09-24 22:59:16,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (1/1) ... [2020-09-24 22:59:16,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:59:16,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:59:16,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:59:16,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:59:16,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (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 [2020-09-24 22:59:16,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:59:16,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:59:16,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 22:59:16,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:59:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:59:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 22:59:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 22:59:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 22:59:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 22:59:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 22:59:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 22:59:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 22:59:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 22:59:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 22:59:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 22:59:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 22:59:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 22:59:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 22:59:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 22:59:16,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:59:16,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:59:16,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:59:20,244 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:59:20,244 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 22:59:20,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:20 BoogieIcfgContainer [2020-09-24 22:59:20,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:59:20,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:59:20,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:59:20,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:59:20,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:59:14" (1/3) ... [2020-09-24 22:59:20,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344083fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:20, skipping insertion in model container [2020-09-24 22:59:20,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:16" (2/3) ... [2020-09-24 22:59:20,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344083fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:20, skipping insertion in model container [2020-09-24 22:59:20,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:20" (3/3) ... [2020-09-24 22:59:20,271 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:59:20,283 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:59:20,297 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:59:20,320 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:59:20,363 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:59:20,363 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:59:20,363 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:59:20,364 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:59:20,364 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:59:20,364 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:59:20,364 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:59:20,364 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:59:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states. [2020-09-24 22:59:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-24 22:59:20,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:20,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:59:20,512 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1035850514, now seen corresponding path program 1 times [2020-09-24 22:59:20,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:20,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369923825] [2020-09-24 22:59:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:23,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:24,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:24,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:25,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:25,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:25,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:26,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-24 22:59:26,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 22:59:26,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5171 [2020-09-24 22:59:26,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:26,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:59:26,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 387 [2020-09-24 22:59:26,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 464 [2020-09-24 22:59:26,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:59:28,048 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 22:59:28,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:28,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:28,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 22:59:28,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:28,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 22:59:28,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:28,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:59:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:59:29,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369923825] [2020-09-24 22:59:29,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:29,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:59:29,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305140324] [2020-09-24 22:59:29,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:59:29,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:59:29,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:29,223 INFO L87 Difference]: Start difference. First operand 2018 states. Second operand 4 states. [2020-09-24 22:59:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:38,581 INFO L93 Difference]: Finished difference Result 3594 states and 4750 transitions. [2020-09-24 22:59:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:38,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 920 [2020-09-24 22:59:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:38,657 INFO L225 Difference]: With dead ends: 3594 [2020-09-24 22:59:38,658 INFO L226 Difference]: Without dead ends: 2873 [2020-09-24 22:59:38,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-09-24 22:59:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2860. [2020-09-24 22:59:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2860 states. [2020-09-24 22:59:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3591 transitions. [2020-09-24 22:59:38,950 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3591 transitions. Word has length 920 [2020-09-24 22:59:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:38,955 INFO L479 AbstractCegarLoop]: Abstraction has 2860 states and 3591 transitions. [2020-09-24 22:59:38,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3591 transitions. [2020-09-24 22:59:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-24 22:59:39,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:39,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:59:39,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:59:39,065 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1742209874, now seen corresponding path program 1 times [2020-09-24 22:59:39,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:39,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973322560] [2020-09-24 22:59:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:39,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:40,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:41,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:42,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:43,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:44,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:44,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:44,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-24 22:59:44,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 22:59:44,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-09-24 22:59:44,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:44,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:59:44,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 286 [2020-09-24 22:59:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-09-24 22:59:44,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 22:59:45,626 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 22:59:45,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:45,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:45,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:45,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 22:59:45,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 22:59:45,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:59:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:59:46,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973322560] [2020-09-24 22:59:46,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:46,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:59:46,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51674665] [2020-09-24 22:59:46,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:59:46,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:46,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:59:46,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:59:46,468 INFO L87 Difference]: Start difference. First operand 2860 states and 3591 transitions. Second operand 5 states. [2020-09-24 23:00:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:00:01,201 INFO L93 Difference]: Finished difference Result 7806 states and 9913 transitions. [2020-09-24 23:00:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 23:00:01,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 920 [2020-09-24 23:00:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:00:01,234 INFO L225 Difference]: With dead ends: 7806 [2020-09-24 23:00:01,234 INFO L226 Difference]: Without dead ends: 5303 [2020-09-24 23:00:01,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 23:00:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2020-09-24 23:00:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5301. [2020-09-24 23:00:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5301 states. [2020-09-24 23:00:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5301 states to 5301 states and 6695 transitions. [2020-09-24 23:00:01,467 INFO L78 Accepts]: Start accepts. Automaton has 5301 states and 6695 transitions. Word has length 920 [2020-09-24 23:00:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:00:01,468 INFO L479 AbstractCegarLoop]: Abstraction has 5301 states and 6695 transitions. [2020-09-24 23:00:01,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 23:00:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5301 states and 6695 transitions. [2020-09-24 23:00:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2020-09-24 23:00:01,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:00:01,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:00:01,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:00:01,495 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:00:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:00:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1874965873, now seen corresponding path program 1 times [2020-09-24 23:00:01,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:00:01,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231292903] [2020-09-24 23:00:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:00:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:00:01,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:00:02,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:00:02,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:00:02,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:00:03,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:00:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:00:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking...