/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:38:57,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:38:57,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:38:57,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:38:57,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:38:57,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:38:57,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:38:57,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:38:57,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:38:57,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:38:57,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:38:57,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:38:57,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:38:57,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:38:57,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:38:57,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:38:57,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:38:57,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:38:57,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:38:57,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:38:57,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:38:57,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:38:57,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:38:57,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:38:57,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:38:57,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:38:57,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:38:57,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:38:57,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:38:57,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:38:57,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:38:57,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:38:57,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:38:57,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:38:57,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:38:57,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:38:57,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:38:57,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:38:57,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:38:57,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:38:57,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:38:57,520 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 12:38:57,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:38:57,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:38:57,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:38:57,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:38:57,572 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:38:57,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:38:57,573 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:38:57,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:38:57,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:38:57,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:38:57,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:38:57,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:38:57,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:38:57,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:38:57,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:38:57,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:38:57,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:38:57,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:38:57,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:38:57,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:38:57,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:38:57,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:38:57,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:38:57,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:38:57,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:38:57,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:38:57,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:38:57,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:38:57,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:38:57,579 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 12:38:58,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:38:58,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:38:58,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:38:58,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:38:58,068 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:38:58,070 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:58,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a316445ee/81e0f14328d3451199d0a67cbf4970e2/FLAG2b8ddbe69 [2020-09-21 12:38:58,826 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:38:58,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:58,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a316445ee/81e0f14328d3451199d0a67cbf4970e2/FLAG2b8ddbe69 [2020-09-21 12:38:59,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a316445ee/81e0f14328d3451199d0a67cbf4970e2 [2020-09-21 12:38:59,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:38:59,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:38:59,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:59,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:38:59,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:38:59,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:59" (1/1) ... [2020-09-21 12:38:59,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248aaf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:59, skipping insertion in model container [2020-09-21 12:38:59,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:59" (1/1) ... [2020-09-21 12:38:59,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:38:59,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:38:59,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:38:59,791 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:00,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:00,022 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:00,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00 WrapperNode [2020-09-21 12:39:00,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:00,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:00,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:00,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:00,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:00,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:00,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:00,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:00,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:39:00,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:00,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:00,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:00,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:00,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:00,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:39:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:01,778 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:01,778 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:01,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:01 BoogieIcfgContainer [2020-09-21 12:39:01,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:01,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:01,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:01,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:01,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:38:59" (1/3) ... [2020-09-21 12:39:01,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d845c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:01, skipping insertion in model container [2020-09-21 12:39:01,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00" (2/3) ... [2020-09-21 12:39:01,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d845c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:01, skipping insertion in model container [2020-09-21 12:39:01,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:01" (3/3) ... [2020-09-21 12:39:01,796 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:01,808 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:01,819 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:39:01,842 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:39:01,874 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:01,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:01,875 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:01,875 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:01,875 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:01,875 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:01,875 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:01,875 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states. [2020-09-21 12:39:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-21 12:39:01,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:01,924 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] [2020-09-21 12:39:01,924 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1057297283, now seen corresponding path program 1 times [2020-09-21 12:39:01,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:01,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100156909] [2020-09-21 12:39:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:03,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:03,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:03,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-21 12:39:03,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:39:03,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-09-21 12:39:03,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-09-21 12:39:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-09-21 12:39:03,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:39:04,141 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:04,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:04,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:04,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:04,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:04,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:04,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:39:04,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:04,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:04,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:04,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:04,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:04,279 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 12:39:04,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100156909] [2020-09-21 12:39:04,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:04,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:04,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429564294] [2020-09-21 12:39:04,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:04,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:04,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:04,320 INFO L87 Difference]: Start difference. First operand 343 states. Second operand 4 states. [2020-09-21 12:39:04,697 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-09-21 12:39:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:06,698 INFO L93 Difference]: Finished difference Result 685 states and 1182 transitions. [2020-09-21 12:39:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:06,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-09-21 12:39:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:06,730 INFO L225 Difference]: With dead ends: 685 [2020-09-21 12:39:06,730 INFO L226 Difference]: Without dead ends: 555 [2020-09-21 12:39:06,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:06,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-09-21 12:39:06,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2020-09-21 12:39:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-09-21 12:39:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 828 transitions. [2020-09-21 12:39:06,861 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 828 transitions. Word has length 153 [2020-09-21 12:39:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:06,864 INFO L479 AbstractCegarLoop]: Abstraction has 553 states and 828 transitions. [2020-09-21 12:39:06,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 828 transitions. [2020-09-21 12:39:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-21 12:39:06,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:06,879 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] [2020-09-21 12:39:06,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:06,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:06,881 INFO L82 PathProgramCache]: Analyzing trace with hash -795620650, now seen corresponding path program 1 times [2020-09-21 12:39:06,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:06,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410357935] [2020-09-21 12:39:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:07,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:07,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:07,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:07,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:08,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:08,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:08,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-21 12:39:08,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:39:08,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-09-21 12:39:08,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:08,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:08,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-21 12:39:08,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-09-21 12:39:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:08,466 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:08,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:08,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:08,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:08,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:08,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:08,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:39:08,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:08,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:08,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:08,596 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 12:39:08,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410357935] [2020-09-21 12:39:08,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:08,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:08,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844075862] [2020-09-21 12:39:08,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:08,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:08,601 INFO L87 Difference]: Start difference. First operand 553 states and 828 transitions. Second operand 4 states. [2020-09-21 12:39:08,862 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-09-21 12:39:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:10,468 INFO L93 Difference]: Finished difference Result 1181 states and 1813 transitions. [2020-09-21 12:39:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:10,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-09-21 12:39:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:10,477 INFO L225 Difference]: With dead ends: 1181 [2020-09-21 12:39:10,478 INFO L226 Difference]: Without dead ends: 967 [2020-09-21 12:39:10,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-09-21 12:39:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 965. [2020-09-21 12:39:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-09-21 12:39:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1456 transitions. [2020-09-21 12:39:10,537 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1456 transitions. Word has length 153 [2020-09-21 12:39:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:10,538 INFO L479 AbstractCegarLoop]: Abstraction has 965 states and 1456 transitions. [2020-09-21 12:39:10,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1456 transitions. [2020-09-21 12:39:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-21 12:39:10,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:10,542 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] [2020-09-21 12:39:10,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:10,542 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -597767463, now seen corresponding path program 1 times [2020-09-21 12:39:10,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:10,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115590355] [2020-09-21 12:39:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:11,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:11,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:11,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:11,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-21 12:39:11,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:39:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-09-21 12:39:11,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:11,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:11,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:11,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 12:39:11,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:12,102 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:12,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:12,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:12,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:12,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:12,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:12,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:39:12,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:12,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:12,197 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 12:39:12,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115590355] [2020-09-21 12:39:12,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:12,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:12,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911837346] [2020-09-21 12:39:12,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:12,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:12,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:12,202 INFO L87 Difference]: Start difference. First operand 965 states and 1456 transitions. Second operand 5 states. [2020-09-21 12:39:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:15,444 INFO L93 Difference]: Finished difference Result 2800 states and 4213 transitions. [2020-09-21 12:39:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:15,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-09-21 12:39:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:15,456 INFO L225 Difference]: With dead ends: 2800 [2020-09-21 12:39:15,456 INFO L226 Difference]: Without dead ends: 1864 [2020-09-21 12:39:15,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2020-09-21 12:39:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1862. [2020-09-21 12:39:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1862 states. [2020-09-21 12:39:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2784 transitions. [2020-09-21 12:39:15,576 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2784 transitions. Word has length 153 [2020-09-21 12:39:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:15,577 INFO L479 AbstractCegarLoop]: Abstraction has 1862 states and 2784 transitions. [2020-09-21 12:39:15,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2784 transitions. [2020-09-21 12:39:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-21 12:39:15,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:15,582 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] [2020-09-21 12:39:15,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:39:15,582 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2072677733, now seen corresponding path program 1 times [2020-09-21 12:39:15,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:15,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930405483] [2020-09-21 12:39:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:15,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:15,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:16,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:16,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:16,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:16,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:16,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-09-21 12:39:16,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:39:16,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-09-21 12:39:16,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:16,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:16,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:39:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:39:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:16,934 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:16,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:16,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:16,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:16,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:16,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:16,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 12:39:16,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:16,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:16,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:16,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:16,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:39:17,057 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 12:39:17,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930405483] [2020-09-21 12:39:17,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:17,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:17,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064209530] [2020-09-21 12:39:17,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:17,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:17,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:17,061 INFO L87 Difference]: Start difference. First operand 1862 states and 2784 transitions. Second operand 4 states. [2020-09-21 12:39:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:20,503 INFO L93 Difference]: Finished difference Result 5540 states and 8280 transitions. [2020-09-21 12:39:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:20,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-09-21 12:39:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:20,529 INFO L225 Difference]: With dead ends: 5540 [2020-09-21 12:39:20,530 INFO L226 Difference]: Without dead ends: 3710 [2020-09-21 12:39:20,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-09-21 12:39:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 1864. [2020-09-21 12:39:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2020-09-21 12:39:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2786 transitions. [2020-09-21 12:39:20,763 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2786 transitions. Word has length 154 [2020-09-21 12:39:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:20,764 INFO L479 AbstractCegarLoop]: Abstraction has 1864 states and 2786 transitions. [2020-09-21 12:39:20,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2786 transitions. [2020-09-21 12:39:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-21 12:39:20,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:20,772 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] [2020-09-21 12:39:20,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:39:20,773 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1511435868, now seen corresponding path program 1 times [2020-09-21 12:39:20,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:20,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985084262] [2020-09-21 12:39:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:21,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:22,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:22,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-21 12:39:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-21 12:39:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-09-21 12:39:22,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:39:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-21 12:39:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:22,269 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:22,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:22,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:22,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:22,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:22,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:22,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 12:39:22,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:22,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:22,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:22,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:22,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:22,371 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 12:39:22,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985084262] [2020-09-21 12:39:22,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:22,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:22,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110877758] [2020-09-21 12:39:22,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:22,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:22,374 INFO L87 Difference]: Start difference. First operand 1864 states and 2786 transitions. Second operand 4 states. [2020-09-21 12:39:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:25,340 INFO L93 Difference]: Finished difference Result 4914 states and 7337 transitions. [2020-09-21 12:39:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:25,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-09-21 12:39:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:25,358 INFO L225 Difference]: With dead ends: 4914 [2020-09-21 12:39:25,359 INFO L226 Difference]: Without dead ends: 3235 [2020-09-21 12:39:25,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2020-09-21 12:39:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3233. [2020-09-21 12:39:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2020-09-21 12:39:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4773 transitions. [2020-09-21 12:39:25,537 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4773 transitions. Word has length 155 [2020-09-21 12:39:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:25,538 INFO L479 AbstractCegarLoop]: Abstraction has 3233 states and 4773 transitions. [2020-09-21 12:39:25,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4773 transitions. [2020-09-21 12:39:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-21 12:39:25,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:25,544 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] [2020-09-21 12:39:25,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:39:25,544 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1385252583, now seen corresponding path program 1 times [2020-09-21 12:39:25,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:25,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659425456] [2020-09-21 12:39:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:25,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:26,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:26,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:26,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:26,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:26,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:26,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-21 12:39:26,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:39:26,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-09-21 12:39:26,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:26,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-21 12:39:26,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:39:26,945 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:26,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:26,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:27,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:27,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:27,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 12:39:27,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:27,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:27,074 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 12:39:27,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659425456] [2020-09-21 12:39:27,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:27,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:27,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464498044] [2020-09-21 12:39:27,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:27,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:27,078 INFO L87 Difference]: Start difference. First operand 3233 states and 4773 transitions. Second operand 5 states. [2020-09-21 12:39:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:29,685 INFO L93 Difference]: Finished difference Result 9415 states and 13845 transitions. [2020-09-21 12:39:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:29,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-09-21 12:39:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:29,715 INFO L225 Difference]: With dead ends: 9415 [2020-09-21 12:39:29,715 INFO L226 Difference]: Without dead ends: 6224 [2020-09-21 12:39:29,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2020-09-21 12:39:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 6222. [2020-09-21 12:39:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6222 states. [2020-09-21 12:39:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 9058 transitions. [2020-09-21 12:39:30,084 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 9058 transitions. Word has length 155 [2020-09-21 12:39:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:30,084 INFO L479 AbstractCegarLoop]: Abstraction has 6222 states and 9058 transitions. [2020-09-21 12:39:30,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 9058 transitions. [2020-09-21 12:39:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-21 12:39:30,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:30,096 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] [2020-09-21 12:39:30,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:39:30,097 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1759934806, now seen corresponding path program 1 times [2020-09-21 12:39:30,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:30,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42224388] [2020-09-21 12:39:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:30,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:30,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:30,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:30,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:30,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:31,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:31,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:31,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-21 12:39:31,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:39:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-09-21 12:39:31,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:39:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:39:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:31,432 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:31,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:31,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:31,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:31,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:31,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:31,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:39:31,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:31,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:31,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:31,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:31,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42224388] [2020-09-21 12:39:31,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:31,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:31,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779066541] [2020-09-21 12:39:31,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:31,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:31,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:31,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:31,499 INFO L87 Difference]: Start difference. First operand 6222 states and 9058 transitions. Second operand 4 states. [2020-09-21 12:39:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:33,544 INFO L93 Difference]: Finished difference Result 18324 states and 26704 transitions. [2020-09-21 12:39:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:33,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-09-21 12:39:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:33,596 INFO L225 Difference]: With dead ends: 18324 [2020-09-21 12:39:33,596 INFO L226 Difference]: Without dead ends: 12392 [2020-09-21 12:39:33,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2020-09-21 12:39:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 6234. [2020-09-21 12:39:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6234 states. [2020-09-21 12:39:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 9074 transitions. [2020-09-21 12:39:33,998 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 9074 transitions. Word has length 156 [2020-09-21 12:39:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:33,998 INFO L479 AbstractCegarLoop]: Abstraction has 6234 states and 9074 transitions. [2020-09-21 12:39:33,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 9074 transitions. [2020-09-21 12:39:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-21 12:39:34,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:34,009 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] [2020-09-21 12:39:34,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:39:34,009 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash 626604444, now seen corresponding path program 1 times [2020-09-21 12:39:34,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:34,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158991789] [2020-09-21 12:39:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:34,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:35,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:35,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:35,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-21 12:39:35,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-21 12:39:35,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-09-21 12:39:35,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:35,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:35,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:39:35,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-21 12:39:35,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:35,389 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:35,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:35,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:35,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:35,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:35,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 12:39:35,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:35,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:35,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:35,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:35,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:35,494 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 12:39:35,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158991789] [2020-09-21 12:39:35,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:35,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:35,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047966353] [2020-09-21 12:39:35,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:35,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:35,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:35,502 INFO L87 Difference]: Start difference. First operand 6234 states and 9074 transitions. Second operand 4 states. [2020-09-21 12:39:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:38,706 INFO L93 Difference]: Finished difference Result 16377 states and 23834 transitions. [2020-09-21 12:39:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:38,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-09-21 12:39:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:38,730 INFO L225 Difference]: With dead ends: 16377 [2020-09-21 12:39:38,730 INFO L226 Difference]: Without dead ends: 10627 [2020-09-21 12:39:38,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2020-09-21 12:39:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 10625. [2020-09-21 12:39:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10625 states. [2020-09-21 12:39:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10625 states to 10625 states and 15262 transitions. [2020-09-21 12:39:39,387 INFO L78 Accepts]: Start accepts. Automaton has 10625 states and 15262 transitions. Word has length 157 [2020-09-21 12:39:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:39,387 INFO L479 AbstractCegarLoop]: Abstraction has 10625 states and 15262 transitions. [2020-09-21 12:39:39,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10625 states and 15262 transitions. [2020-09-21 12:39:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-21 12:39:39,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:39,408 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] [2020-09-21 12:39:39,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:39:39,409 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash 392633631, now seen corresponding path program 1 times [2020-09-21 12:39:39,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:39,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107808456] [2020-09-21 12:39:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:39,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:39,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:40,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-21 12:39:40,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-21 12:39:40,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:39:40,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-21 12:39:40,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:40,779 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:40,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:40,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:40,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:40,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:40,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:40,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 12:39:40,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:40,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:40,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:40,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:40,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:40,878 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 12:39:40,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107808456] [2020-09-21 12:39:40,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:40,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:40,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567308672] [2020-09-21 12:39:40,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:40,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:40,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:40,890 INFO L87 Difference]: Start difference. First operand 10625 states and 15262 transitions. Second operand 5 states. [2020-09-21 12:39:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:44,472 INFO L93 Difference]: Finished difference Result 30825 states and 44132 transitions. [2020-09-21 12:39:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:44,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-09-21 12:39:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:44,517 INFO L225 Difference]: With dead ends: 30825 [2020-09-21 12:39:44,517 INFO L226 Difference]: Without dead ends: 20328 [2020-09-21 12:39:44,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20328 states. [2020-09-21 12:39:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20328 to 20326. [2020-09-21 12:39:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20326 states. [2020-09-21 12:39:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 28834 transitions. [2020-09-21 12:39:46,386 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 28834 transitions. Word has length 157 [2020-09-21 12:39:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:46,386 INFO L479 AbstractCegarLoop]: Abstraction has 20326 states and 28834 transitions. [2020-09-21 12:39:46,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 28834 transitions. [2020-09-21 12:39:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-21 12:39:46,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:46,406 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] [2020-09-21 12:39:46,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:39:46,407 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:46,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1900673350, now seen corresponding path program 1 times [2020-09-21 12:39:46,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:46,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808956199] [2020-09-21 12:39:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:46,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:47,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:47,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:47,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:47,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:47,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-21 12:39:47,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:39:47,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-09-21 12:39:47,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:47,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:47,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:47,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-21 12:39:47,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:47,895 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-21 12:39:47,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:47,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:47,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:47,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:47,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:47,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 12:39:47,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:47,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:47,975 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 12:39:47,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808956199] [2020-09-21 12:39:47,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:47,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:47,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821515311] [2020-09-21 12:39:47,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:47,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:47,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:47,977 INFO L87 Difference]: Start difference. First operand 20326 states and 28834 transitions. Second operand 5 states.