/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:10:38,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:10:38,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:10:38,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:10:38,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:10:38,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:10:38,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:10:38,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:10:38,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:10:38,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:10:38,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:10:38,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:10:38,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:10:38,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:10:38,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:10:38,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:10:38,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:10:38,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:10:38,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:10:38,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:10:38,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:10:38,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:10:38,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:10:38,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:10:38,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:10:38,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:10:38,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:10:38,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:10:38,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:10:38,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:10:38,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:10:38,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:10:38,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:10:38,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:10:38,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:10:38,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:10:38,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:10:38,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:10:38,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:10:38,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:10:38,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:10:38,317 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 [2020-10-29 13:10:38,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:10:38,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:10:38,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:10:38,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:10:38,377 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:10:38,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:10:38,378 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:10:38,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:10:38,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:10:38,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:10:38,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:10:38,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:10:38,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:10:38,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:10:38,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:10:38,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:10:38,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:10:38,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:10:38,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:10:38,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:10:38,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:10:38,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:10:38,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:10:38,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:10:38,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:10:38,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:10:38,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:10:38,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:10:38,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:10:38,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:10:38,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:10:38,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:10:38,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:10:38,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:10:38,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:10:38,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-29 13:10:38,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18d766b85/bba1ef2792304fb6be19de2fc27d13e1/FLAG090d4422f [2020-10-29 13:10:39,638 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:10:39,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-29 13:10:39,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18d766b85/bba1ef2792304fb6be19de2fc27d13e1/FLAG090d4422f [2020-10-29 13:10:39,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18d766b85/bba1ef2792304fb6be19de2fc27d13e1 [2020-10-29 13:10:39,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:10:39,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:10:39,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:10:39,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:10:39,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:10:39,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:10:39" (1/1) ... [2020-10-29 13:10:39,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66dfe16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:39, skipping insertion in model container [2020-10-29 13:10:39,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:10:39" (1/1) ... [2020-10-29 13:10:39,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:10:39,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:10:41,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:10:41,476 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:10:42,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:10:42,317 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:10:42,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42 WrapperNode [2020-10-29 13:10:42,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:10:42,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:10:42,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:10:42,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:10:42,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (1/1) ... [2020-10-29 13:10:42,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (1/1) ... [2020-10-29 13:10:42,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (1/1) ... [2020-10-29 13:10:42,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (1/1) ... [2020-10-29 13:10:42,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (1/1) ... [2020-10-29 13:10:42,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (1/1) ... [2020-10-29 13:10:42,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (1/1) ... [2020-10-29 13:10:42,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:10:42,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:10:42,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:10:42,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:10:42,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (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 [2020-10-29 13:10:42,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:10:42,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:10:42,676 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:10:42,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:10:42,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:10:42,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:10:42,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:10:42,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:10:42,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:10:42,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:10:42,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:10:42,679 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:10:42,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:10:42,680 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:10:42,680 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:10:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:10:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:10:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:10:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:10:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:10:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:10:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:10:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:10:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:10:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:10:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:10:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:10:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:10:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:10:47,092 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:10:47,094 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:10:47,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:10:47 BoogieIcfgContainer [2020-10-29 13:10:47,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:10:47,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:10:47,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:10:47,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:10:47,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:10:39" (1/3) ... [2020-10-29 13:10:47,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278e0546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:10:47, skipping insertion in model container [2020-10-29 13:10:47,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:10:42" (2/3) ... [2020-10-29 13:10:47,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278e0546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:10:47, skipping insertion in model container [2020-10-29 13:10:47,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:10:47" (3/3) ... [2020-10-29 13:10:47,110 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-29 13:10:47,123 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:10:47,133 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:10:47,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:10:47,204 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:10:47,204 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:10:47,204 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:10:47,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:10:47,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:10:47,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:10:47,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:10:47,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:10:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states. [2020-10-29 13:10:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-29 13:10:47,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:10:47,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:10:47,316 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:10:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:10:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1206753479, now seen corresponding path program 1 times [2020-10-29 13:10:47,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:10:47,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838860530] [2020-10-29 13:10:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:10:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:48,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:48,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:48,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:49,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:49,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:50,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:52,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:53,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:53,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-29 13:10:53,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:10:53,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-29 13:10:53,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:53,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:10:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:10:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-29 13:10:53,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:10:54,930 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-29 13:10:54,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:10:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:54,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:54,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:54,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:10:54,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:10:54,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 13:10:54,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:54,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:54,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:10:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:10:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:10:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:10:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:10:55,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838860530] [2020-10-29 13:10:55,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:10:55,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:10:55,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706995353] [2020-10-29 13:10:55,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:10:55,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:10:55,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:10:55,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:10:55,440 INFO L87 Difference]: Start difference. First operand 1443 states. Second operand 5 states. [2020-10-29 13:11:10,859 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:11:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:11:13,530 INFO L93 Difference]: Finished difference Result 4201 states and 7484 transitions. [2020-10-29 13:11:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:11:13,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 361 [2020-10-29 13:11:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:11:13,572 INFO L225 Difference]: With dead ends: 4201 [2020-10-29 13:11:13,572 INFO L226 Difference]: Without dead ends: 2799 [2020-10-29 13:11:13,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:11:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2020-10-29 13:11:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2796. [2020-10-29 13:11:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2796 states. [2020-10-29 13:11:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 4690 transitions. [2020-10-29 13:11:13,799 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 4690 transitions. Word has length 361 [2020-10-29 13:11:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:11:13,800 INFO L481 AbstractCegarLoop]: Abstraction has 2796 states and 4690 transitions. [2020-10-29 13:11:13,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:11:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 4690 transitions. [2020-10-29 13:11:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-29 13:11:13,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:11:13,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:11:13,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:11:13,814 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:11:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:11:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash -780304292, now seen corresponding path program 1 times [2020-10-29 13:11:13,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:11:13,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60741170] [2020-10-29 13:11:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:11:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:14,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:14,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:14,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:14,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:14,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:15,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:16,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:17,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:18,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:19,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:19,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-29 13:11:19,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:11:19,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-29 13:11:19,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:19,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:19,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:11:19,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:11:19,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-29 13:11:19,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:11:20,606 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-29 13:11:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:11:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:20,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:20,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:20,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:11:20,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:11:20,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:11:20,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:20,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:20,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:11:20,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:11:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:11:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:11:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:11:20,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60741170] [2020-10-29 13:11:20,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:11:20,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:11:20,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906133773] [2020-10-29 13:11:20,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:11:20,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:11:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:11:21,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:11:21,000 INFO L87 Difference]: Start difference. First operand 2796 states and 4690 transitions. Second operand 4 states. [2020-10-29 13:11:40,463 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 414 [2020-10-29 13:11:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:11:43,206 INFO L93 Difference]: Finished difference Result 8124 states and 13605 transitions. [2020-10-29 13:11:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:11:43,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 363 [2020-10-29 13:11:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:11:43,245 INFO L225 Difference]: With dead ends: 8124 [2020-10-29 13:11:43,246 INFO L226 Difference]: Without dead ends: 5494 [2020-10-29 13:11:43,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:11:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5494 states. [2020-10-29 13:11:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5494 to 5491. [2020-10-29 13:11:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5491 states. [2020-10-29 13:11:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 9178 transitions. [2020-10-29 13:11:43,492 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 9178 transitions. Word has length 363 [2020-10-29 13:11:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:11:43,493 INFO L481 AbstractCegarLoop]: Abstraction has 5491 states and 9178 transitions. [2020-10-29 13:11:43,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:11:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 9178 transitions. [2020-10-29 13:11:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-29 13:11:43,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:11:43,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:11:43,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:11:43,510 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:11:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:11:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1834038872, now seen corresponding path program 1 times [2020-10-29 13:11:43,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:11:43,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326361760] [2020-10-29 13:11:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:11:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:43,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:43,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:43,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:44,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:44,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:44,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:46,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:47,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:47,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:48,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:48,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:48,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-29 13:11:48,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:11:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-29 13:11:48,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:48,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:11:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:11:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-29 13:11:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:11:50,103 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-29 13:11:50,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:11:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:50,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:50,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:11:50,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:11:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:11:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:50,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:11:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:11:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:11:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:11:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:11:50,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326361760] [2020-10-29 13:11:50,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:11:50,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:11:50,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524221226] [2020-10-29 13:11:50,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:11:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:11:50,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:11:50,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:11:50,562 INFO L87 Difference]: Start difference. First operand 5491 states and 9178 transitions. Second operand 5 states. [2020-10-29 13:12:03,537 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:12:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:05,473 INFO L93 Difference]: Finished difference Result 13048 states and 21769 transitions. [2020-10-29 13:12:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:12:05,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 364 [2020-10-29 13:12:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:05,523 INFO L225 Difference]: With dead ends: 13048 [2020-10-29 13:12:05,523 INFO L226 Difference]: Without dead ends: 7909 [2020-10-29 13:12:05,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:12:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7909 states. [2020-10-29 13:12:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7909 to 5485. [2020-10-29 13:12:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5485 states. [2020-10-29 13:12:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 9166 transitions. [2020-10-29 13:12:05,872 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 9166 transitions. Word has length 364 [2020-10-29 13:12:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:05,873 INFO L481 AbstractCegarLoop]: Abstraction has 5485 states and 9166 transitions. [2020-10-29 13:12:05,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:12:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 9166 transitions. [2020-10-29 13:12:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-29 13:12:05,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:05,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:05,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:12:05,891 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash 101296767, now seen corresponding path program 1 times [2020-10-29 13:12:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:05,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099056714] [2020-10-29 13:12:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:06,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:06,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:06,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:07,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:07,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:07,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:10,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:10,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:11,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:11,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-29 13:12:11,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:12:11,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 13:12:11,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:11,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:11,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:12:11,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:12:11,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-29 13:12:11,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:12,472 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-29 13:12:12,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:12,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:12,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:12,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:12,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:12,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 13:12:12,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:12,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:12,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:12,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:12,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:12,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:12,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099056714] [2020-10-29 13:12:12,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:12,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:12:12,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773087851] [2020-10-29 13:12:12,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:12:12,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:12:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:12:12,968 INFO L87 Difference]: Start difference. First operand 5485 states and 9166 transitions. Second operand 5 states. [2020-10-29 13:12:29,107 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:12:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:32,155 INFO L93 Difference]: Finished difference Result 16117 states and 26905 transitions. [2020-10-29 13:12:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:12:32,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 365 [2020-10-29 13:12:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:32,200 INFO L225 Difference]: With dead ends: 16117 [2020-10-29 13:12:32,200 INFO L226 Difference]: Without dead ends: 10849 [2020-10-29 13:12:32,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:12:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10849 states. [2020-10-29 13:12:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10849 to 10846. [2020-10-29 13:12:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10846 states. [2020-10-29 13:12:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10846 states to 10846 states and 18062 transitions. [2020-10-29 13:12:33,087 INFO L78 Accepts]: Start accepts. Automaton has 10846 states and 18062 transitions. Word has length 365 [2020-10-29 13:12:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:33,088 INFO L481 AbstractCegarLoop]: Abstraction has 10846 states and 18062 transitions. [2020-10-29 13:12:33,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:12:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10846 states and 18062 transitions. [2020-10-29 13:12:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-29 13:12:33,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:33,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:33,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:12:33,118 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1058102478, now seen corresponding path program 1 times [2020-10-29 13:12:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:33,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976860817] [2020-10-29 13:12:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:33,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:36,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:37,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:37,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:38,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-29 13:12:38,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:12:38,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:12:38,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:38,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:38,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:12:38,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:12:38,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-29 13:12:38,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:39,675 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-29 13:12:39,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:39,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:39,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:39,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:39,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:12:39,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:39,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:39,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976860817] [2020-10-29 13:12:39,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:39,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:12:39,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502878132] [2020-10-29 13:12:39,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:12:39,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:39,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:12:39,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:12:39,912 INFO L87 Difference]: Start difference. First operand 10846 states and 18062 transitions. Second operand 4 states. [2020-10-29 13:13:01,065 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 414 [2020-10-29 13:13:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:03,997 INFO L93 Difference]: Finished difference Result 31881 states and 53040 transitions. [2020-10-29 13:13:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:13:03,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 367 [2020-10-29 13:13:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:04,045 INFO L225 Difference]: With dead ends: 31881 [2020-10-29 13:13:04,045 INFO L226 Difference]: Without dead ends: 21446 [2020-10-29 13:13:04,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:13:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21446 states. [2020-10-29 13:13:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21446 to 21443. [2020-10-29 13:13:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21443 states. [2020-10-29 13:13:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 35576 transitions. [2020-10-29 13:13:05,366 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 35576 transitions. Word has length 367 [2020-10-29 13:13:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:05,367 INFO L481 AbstractCegarLoop]: Abstraction has 21443 states and 35576 transitions. [2020-10-29 13:13:05,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:13:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 35576 transitions. [2020-10-29 13:13:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-10-29 13:13:05,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:05,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:05,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:13:05,422 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash -192271723, now seen corresponding path program 1 times [2020-10-29 13:13:05,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:05,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200438922] [2020-10-29 13:13:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:05,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:05,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:05,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:05,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 376 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-29 13:13:10,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:11,847 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-29 13:13:11,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:11,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:11,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:11,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:11,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:13:11,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:11,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:12,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200438922] [2020-10-29 13:13:12,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:12,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:13:12,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737493560] [2020-10-29 13:13:12,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:13:12,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:12,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:13:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:13:12,089 INFO L87 Difference]: Start difference. First operand 21443 states and 35576 transitions. Second operand 4 states. [2020-10-29 13:13:36,047 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 414 [2020-10-29 13:13:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:39,458 INFO L93 Difference]: Finished difference Result 63182 states and 104750 transitions. [2020-10-29 13:13:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:13:39,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 368 [2020-10-29 13:13:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:39,564 INFO L225 Difference]: With dead ends: 63182 [2020-10-29 13:13:39,564 INFO L226 Difference]: Without dead ends: 42297 [2020-10-29 13:13:39,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:13:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42297 states. [2020-10-29 13:13:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42297 to 42294. [2020-10-29 13:13:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42294 states. [2020-10-29 13:13:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42294 states to 42294 states and 69894 transitions. [2020-10-29 13:13:42,235 INFO L78 Accepts]: Start accepts. Automaton has 42294 states and 69894 transitions. Word has length 368 [2020-10-29 13:13:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:42,236 INFO L481 AbstractCegarLoop]: Abstraction has 42294 states and 69894 transitions. [2020-10-29 13:13:42,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:13:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42294 states and 69894 transitions. [2020-10-29 13:13:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-10-29 13:13:42,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:42,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:42,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:13:42,352 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash -922608080, now seen corresponding path program 1 times [2020-10-29 13:13:42,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:42,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778611415] [2020-10-29 13:13:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:42,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:45,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:45,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:47,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 376 [2020-10-29 13:13:47,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:13:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 13:13:47,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:47,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:13:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 203 [2020-10-29 13:13:47,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:48,905 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-29 13:13:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:48,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:48,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:48,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:13:48,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:48,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778611415] [2020-10-29 13:13:49,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:49,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:49,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73148619] [2020-10-29 13:13:49,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:13:49,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:13:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:13:49,202 INFO L87 Difference]: Start difference. First operand 42294 states and 69894 transitions. Second operand 5 states. [2020-10-29 13:14:10,957 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:14:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:15,437 INFO L93 Difference]: Finished difference Result 123951 states and 204499 transitions. [2020-10-29 13:14:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:14:15,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2020-10-29 13:14:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:15,659 INFO L225 Difference]: With dead ends: 123951 [2020-10-29 13:14:15,659 INFO L226 Difference]: Without dead ends: 83528 [2020-10-29 13:14:15,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:14:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83528 states.