/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/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:26:19,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:26:19,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:26:19,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:26:19,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:26:19,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:26:19,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:26:19,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:26:19,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:26:19,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:26:19,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:26:19,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:26:19,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:26:19,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:26:19,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:26:19,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:26:19,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:26:19,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:26:19,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:26:19,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:26:19,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:26:19,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:26:19,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:26:19,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:26:19,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:26:19,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:26:19,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:26:19,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:26:19,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:26:19,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:26:19,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:26:19,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:26:19,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:26:19,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:26:19,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:26:19,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:26:19,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:26:19,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:26:19,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:26:19,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:26:19,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:26:19,262 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 12:26:19,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:26:19,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:26:19,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:26:19,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:26:19,314 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:26:19,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:26:19,315 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:26:19,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:26:19,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:26:19,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:26:19,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:26:19,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:26:19,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:26:19,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:26:19,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:26:19,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:26:19,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:26:19,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:26:19,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:26:19,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:26:19,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:26:19,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:26:19,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:26:19,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:26:19,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:26:19,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:26:19,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:26:19,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:26:19,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:26:19,321 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 12:26:19,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:26:19,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:26:19,798 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:26:19,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:26:19,801 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:26:19,802 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-21 12:26:19,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc65608a8/74a97368d0c44601b2e10ff4fae4762c/FLAG152305a08 [2020-09-21 12:26:20,467 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:26:20,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-21 12:26:20,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc65608a8/74a97368d0c44601b2e10ff4fae4762c/FLAG152305a08 [2020-09-21 12:26:20,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc65608a8/74a97368d0c44601b2e10ff4fae4762c [2020-09-21 12:26:20,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:26:20,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:26:20,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:26:20,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:26:20,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:26:20,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:26:20" (1/1) ... [2020-09-21 12:26:20,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217a2c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:20, skipping insertion in model container [2020-09-21 12:26:20,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:26:20" (1/1) ... [2020-09-21 12:26:20,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:26:20,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:26:21,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:26:21,116 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:26:21,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:26:21,157 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:26:21,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21 WrapperNode [2020-09-21 12:26:21,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:26:21,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:26:21,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:26:21,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:26:21,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (1/1) ... [2020-09-21 12:26:21,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (1/1) ... [2020-09-21 12:26:21,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (1/1) ... [2020-09-21 12:26:21,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (1/1) ... [2020-09-21 12:26:21,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (1/1) ... [2020-09-21 12:26:21,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (1/1) ... [2020-09-21 12:26:21,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (1/1) ... [2020-09-21 12:26:21,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:26:21,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:26:21,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:26:21,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:26:21,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (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 12:26:21,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:26:21,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:26:21,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-09-21 12:26:21,373 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-21 12:26:21,373 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-21 12:26:21,373 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-09-21 12:26:21,373 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-09-21 12:26:21,373 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-09-21 12:26:21,374 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-09-21 12:26:21,374 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-09-21 12:26:21,374 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-09-21 12:26:21,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:26:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:26:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-09-21 12:26:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:26:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-21 12:26:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-21 12:26:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-09-21 12:26:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-09-21 12:26:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-09-21 12:26:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-09-21 12:26:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-09-21 12:26:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-09-21 12:26:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:26:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:26:21,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:26:21,780 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:26:21,780 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:26:21,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:26:21 BoogieIcfgContainer [2020-09-21 12:26:21,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:26:21,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:26:21,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:26:21,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:26:21,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:26:20" (1/3) ... [2020-09-21 12:26:21,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e72e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:26:21, skipping insertion in model container [2020-09-21 12:26:21,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:21" (2/3) ... [2020-09-21 12:26:21,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e72e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:26:21, skipping insertion in model container [2020-09-21 12:26:21,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:26:21" (3/3) ... [2020-09-21 12:26:21,796 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-09-21 12:26:21,807 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:26:21,817 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:26:21,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:26:21,865 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:26:21,865 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:26:21,865 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:26:21,865 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:26:21,865 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:26:21,865 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:26:21,866 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:26:21,866 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:26:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-09-21 12:26:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:26:21,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:21,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:21,895 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:21,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1865767033, now seen corresponding path program 1 times [2020-09-21 12:26:21,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:21,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399747648] [2020-09-21 12:26:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:22,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:22,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:22,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:26:22,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:22,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-21 12:26:22,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:26:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:22,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:26:22,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:22,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:22,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:22,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:22,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:22,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:26:22,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:22,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:22,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:22,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:22,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:22,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:22,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:22,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:22,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:22,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:22,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:22,289 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 12:26:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399747648] [2020-09-21 12:26:22,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:22,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:26:22,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905183276] [2020-09-21 12:26:22,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:26:22,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:26:22,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:26:22,325 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 4 states. [2020-09-21 12:26:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:22,536 INFO L93 Difference]: Finished difference Result 140 states and 185 transitions. [2020-09-21 12:26:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:26:22,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 12:26:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:22,557 INFO L225 Difference]: With dead ends: 140 [2020-09-21 12:26:22,558 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 12:26:22,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:26:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 12:26:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-09-21 12:26:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-21 12:26:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-09-21 12:26:22,631 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 16 [2020-09-21 12:26:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:22,632 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-09-21 12:26:22,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:26:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-09-21 12:26:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 12:26:22,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:22,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:22,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:26:22,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 6927045, now seen corresponding path program 1 times [2020-09-21 12:26:22,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:22,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872356147] [2020-09-21 12:26:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:22,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:22,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:26:22,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:22,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 12:26:22,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:26:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:26:22,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:22,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:22,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:22,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:22,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:22,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:26:22,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:22,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:22,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:22,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:22,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:22,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:22,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:26:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:22,790 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 12:26:22,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872356147] [2020-09-21 12:26:22,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:22,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:26:22,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671185733] [2020-09-21 12:26:22,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:26:22,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:22,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:26:22,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:26:22,796 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 5 states. [2020-09-21 12:26:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:23,130 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2020-09-21 12:26:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:26:23,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-21 12:26:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:23,134 INFO L225 Difference]: With dead ends: 112 [2020-09-21 12:26:23,135 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 12:26:23,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:26:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 12:26:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-09-21 12:26:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-21 12:26:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-09-21 12:26:23,185 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 17 [2020-09-21 12:26:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:23,185 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-09-21 12:26:23,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:26:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-09-21 12:26:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:26:23,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:23,191 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] [2020-09-21 12:26:23,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:26:23,192 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:23,193 INFO L82 PathProgramCache]: Analyzing trace with hash -695621135, now seen corresponding path program 1 times [2020-09-21 12:26:23,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:23,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164291027] [2020-09-21 12:26:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:23,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:23,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:23,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:24,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:24,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:26:24,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:26:24,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-09-21 12:26:24,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:26:24,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:24,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:24,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:24,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:24,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:24,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:24,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:24,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:24,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:24,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:24,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:24,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:24,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:24,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:24,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:26:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:24,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:24,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:24,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:24,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:26:24,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:24,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:26:24,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:24,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:24,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:26:24,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:24,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:24,231 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 12:26:24,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164291027] [2020-09-21 12:26:24,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:24,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:26:24,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138631059] [2020-09-21 12:26:24,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:26:24,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:24,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:26:24,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:26:24,240 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 6 states. [2020-09-21 12:26:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:24,602 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2020-09-21 12:26:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:26:24,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-21 12:26:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:24,607 INFO L225 Difference]: With dead ends: 253 [2020-09-21 12:26:24,609 INFO L226 Difference]: Without dead ends: 162 [2020-09-21 12:26:24,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:26:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-21 12:26:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2020-09-21 12:26:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-21 12:26:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2020-09-21 12:26:24,640 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 29 [2020-09-21 12:26:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:24,640 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2020-09-21 12:26:24,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:26:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2020-09-21 12:26:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 12:26:24,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:24,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:24,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:26:24,643 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1328709660, now seen corresponding path program 1 times [2020-09-21 12:26:24,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297749996] [2020-09-21 12:26:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:25,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:25,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:25,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 12:26:25,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:26:25,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:26:25,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:25,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:26:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 12:26:25,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:25,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:25,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:25,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:25,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:25,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:25,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:25,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:25,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:25,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:25,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:25,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:25,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:25,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:25,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:25,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:26:25,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:25,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 12:26:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:25,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:25,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:25,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:26:25,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:25,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:26:25,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:25,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:25,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:25,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:26:25,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:25,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 12:26:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:25,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:25,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:26:25,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:25,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:25,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:26:25,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:25,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:25,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297749996] [2020-09-21 12:26:25,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:25,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:26:25,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591071083] [2020-09-21 12:26:25,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:26:25,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:25,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:26:25,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:26:25,800 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand 7 states. [2020-09-21 12:26:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:26,128 INFO L93 Difference]: Finished difference Result 350 states and 513 transitions. [2020-09-21 12:26:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:26,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-09-21 12:26:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:26,132 INFO L225 Difference]: With dead ends: 350 [2020-09-21 12:26:26,133 INFO L226 Difference]: Without dead ends: 235 [2020-09-21 12:26:26,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-21 12:26:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2020-09-21 12:26:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-21 12:26:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 208 transitions. [2020-09-21 12:26:26,154 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 208 transitions. Word has length 40 [2020-09-21 12:26:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:26,155 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 208 transitions. [2020-09-21 12:26:26,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:26:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 208 transitions. [2020-09-21 12:26:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 12:26:26,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:26,157 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:26,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:26:26,158 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1520942249, now seen corresponding path program 1 times [2020-09-21 12:26:26,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:26,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045632263] [2020-09-21 12:26:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:26,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:26,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:26,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:26,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:26,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:27,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:27,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:26:27,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:26:27,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:26:27,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:27,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:26:27,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-21 12:26:27,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:26:27,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:27,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:27,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:27,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:27,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:27,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:26:27,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:27,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:27,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:27,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:27,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:27,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:27,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:27,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:27,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:27,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:27,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:26:27,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:27,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:27,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 12:26:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:27,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:27,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:27,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:26:27,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:27,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:27,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:27,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:27,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:27,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:27,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:27,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:27,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:27,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:26:27,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:26:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:27,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 12:26:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:27,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:27,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:26:27,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:27,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:26:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:27,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 12:26:27,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045632263] [2020-09-21 12:26:27,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:27,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:26:27,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241926642] [2020-09-21 12:26:27,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:26:27,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:27,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:26:27,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:26:27,299 INFO L87 Difference]: Start difference. First operand 150 states and 208 transitions. Second operand 7 states. [2020-09-21 12:26:27,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:27,650 INFO L93 Difference]: Finished difference Result 482 states and 723 transitions. [2020-09-21 12:26:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:27,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-09-21 12:26:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:27,654 INFO L225 Difference]: With dead ends: 482 [2020-09-21 12:26:27,655 INFO L226 Difference]: Without dead ends: 343 [2020-09-21 12:26:27,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-09-21 12:26:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 198. [2020-09-21 12:26:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-09-21 12:26:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 288 transitions. [2020-09-21 12:26:27,701 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 288 transitions. Word has length 51 [2020-09-21 12:26:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:27,701 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 288 transitions. [2020-09-21 12:26:27,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:26:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 288 transitions. [2020-09-21 12:26:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 12:26:27,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:27,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:27,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:26:27,711 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1574199465, now seen corresponding path program 1 times [2020-09-21 12:26:27,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:27,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171456478] [2020-09-21 12:26:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:27,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:27,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:28,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:28,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-21 12:26:28,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:28,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-09-21 12:26:28,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:28,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:26:28,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-09-21 12:26:28,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:26:28,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:28,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:28,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:28,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:28,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:28,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:26:28,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:28,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:28,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:28,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:28,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:28,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:28,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:28,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:28,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:26:28,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:28,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:28,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:28,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:28,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:28,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 12:26:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:28,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:28,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:28,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:26:28,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:28,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:28,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:28,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:28,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:28,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:28,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:28,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:28,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:28,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:26:28,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:28,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:28,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:28,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 12:26:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:28,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:28,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:28,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:28,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:28,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:26:28,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:28,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:28,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:28,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:28,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:28,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-21 12:26:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:28,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:28,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:26:28,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:28,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:28,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:28,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:28,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:28,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:26:28,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 12:26:28,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171456478] [2020-09-21 12:26:28,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:28,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:26:28,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464422576] [2020-09-21 12:26:28,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:26:28,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:28,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:26:28,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:26:28,724 INFO L87 Difference]: Start difference. First operand 198 states and 288 transitions. Second operand 6 states. [2020-09-21 12:26:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:28,872 INFO L93 Difference]: Finished difference Result 366 states and 542 transitions. [2020-09-21 12:26:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:26:28,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-09-21 12:26:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:28,875 INFO L225 Difference]: With dead ends: 366 [2020-09-21 12:26:28,876 INFO L226 Difference]: Without dead ends: 179 [2020-09-21 12:26:28,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:26:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-21 12:26:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 110. [2020-09-21 12:26:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-21 12:26:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 149 transitions. [2020-09-21 12:26:28,890 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 149 transitions. Word has length 63 [2020-09-21 12:26:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:28,891 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 149 transitions. [2020-09-21 12:26:28,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:26:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 149 transitions. [2020-09-21 12:26:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 12:26:28,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:28,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:28,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:26:28,897 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1192820603, now seen corresponding path program 1 times [2020-09-21 12:26:28,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:28,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887659639] [2020-09-21 12:26:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:26:28,920 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:26:28,920 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:26:28,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:26:28,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:26:28 BoogieIcfgContainer [2020-09-21 12:26:28,954 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:26:28,958 INFO L168 Benchmark]: Toolchain (without parser) took 8140.05 ms. Allocated memory was 140.0 MB in the beginning and 283.1 MB in the end (delta: 143.1 MB). Free memory was 103.0 MB in the beginning and 166.7 MB in the end (delta: -63.6 MB). Peak memory consumption was 79.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:28,959 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:26:28,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.87 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:28,966 INFO L168 Benchmark]: Boogie Preprocessor took 133.25 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 180.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:28,967 INFO L168 Benchmark]: RCFGBuilder took 493.76 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 161.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:28,968 INFO L168 Benchmark]: TraceAbstraction took 7166.59 ms. Allocated memory was 202.9 MB in the beginning and 283.1 MB in the end (delta: 80.2 MB). Free memory was 160.4 MB in the beginning and 166.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:28,980 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.87 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.25 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 180.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 493.76 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 161.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7166.59 ms. Allocated memory was 202.9 MB in the beginning and 283.1 MB in the end (delta: 80.2 MB). Free memory was 160.4 MB in the beginning and 166.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; [L74] int ldv_s_misc_fops_file_operations = 0; [L75] CALL my_init() [L69] open_called = 0 [L70] return 0; [L75] RET my_init() [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L82] CALL misc_open() [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; [L82] RET misc_open() [L83] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L90] CALL misc_read() [L52] return 0; [L90] RET misc_read() [L91] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L98] CALL misc_llseek() [L48] return 0; [L98] RET misc_llseek() [L99] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L106] CALL misc_release() [L34] COND FALSE !(\read(open_called)) [L41] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L17] ldv_mutex = 2 [L41] RET mutex_lock() [L42] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L16] CALL __blast_assert() [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 408 SDtfs, 559 SDslu, 713 SDs, 0 SdLazy, 672 SolverSat, 218 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 344 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 279 NumberOfCodeBlocks, 279 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 15038 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 36/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...