/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:32:42,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:32:42,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:32:42,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:32:42,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:32:42,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:32:42,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:32:42,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:32:42,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:32:42,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:32:42,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:32:42,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:32:42,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:32:42,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:32:42,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:32:42,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:32:42,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:32:42,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:32:42,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:32:42,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:32:42,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:32:42,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:32:42,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:32:42,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:32:42,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:32:42,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:32:42,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:32:42,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:32:42,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:32:42,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:32:42,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:32:42,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:32:42,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:32:42,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:32:42,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:32:42,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:32:42,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:32:42,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:32:42,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:32:42,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:32:42,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:32:42,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:32:42,133 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:32:42,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:32:42,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:32:42,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:32:42,135 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:32:42,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:32:42,135 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:32:42,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:32:42,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:32:42,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:32:42,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:32:42,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:32:42,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:32:42,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:32:42,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:32:42,137 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:32:42,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:32:42,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:32:42,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:32:42,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:32:42,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:32:42,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:32:42,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:32:42,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:32:42,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:32:42,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:32:42,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:32:42,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:32:42,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:32:42,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=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=5000;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=5000;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=5000;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=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:32:42,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:32:42,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:32:42,673 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:32:42,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:32:42,677 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:32:42,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:42,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35e96b46/8a140a2f570c43a0809c1f8ef2c541f5/FLAG2e3a1726d [2020-09-24 18:32:43,534 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:32:43,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:43,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35e96b46/8a140a2f570c43a0809c1f8ef2c541f5/FLAG2e3a1726d [2020-09-24 18:32:43,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35e96b46/8a140a2f570c43a0809c1f8ef2c541f5 [2020-09-24 18:32:43,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:32:43,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:32:43,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:43,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:32:43,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:32:43,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc260e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43, skipping insertion in model container [2020-09-24 18:32:43,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:32:43,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:32:45,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:45,088 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:32:45,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:45,666 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:32:45,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45 WrapperNode [2020-09-24 18:32:45,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:45,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:32:45,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:32:45,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:32:45,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... [2020-09-24 18:32:45,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... [2020-09-24 18:32:45,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... [2020-09-24 18:32:45,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... [2020-09-24 18:32:45,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... [2020-09-24 18:32:45,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... [2020-09-24 18:32:45,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... [2020-09-24 18:32:45,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:32:45,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:32:45,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:32:45,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:32:45,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:32:45,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:32:45,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:32:45,942 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 18:32:45,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:32:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:32:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:32:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 18:32:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 18:32:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 18:32:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:32:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 18:32:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 18:32:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 18:32:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 18:32:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 18:32:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 18:32:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 18:32:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 18:32:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 18:32:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:32:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:32:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:32:49,013 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:32:49,013 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:32:49,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:49 BoogieIcfgContainer [2020-09-24 18:32:49,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:32:49,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:32:49,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:32:49,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:32:49,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:32:43" (1/3) ... [2020-09-24 18:32:49,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d5ea33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:49, skipping insertion in model container [2020-09-24 18:32:49,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:45" (2/3) ... [2020-09-24 18:32:49,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d5ea33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:49, skipping insertion in model container [2020-09-24 18:32:49,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:49" (3/3) ... [2020-09-24 18:32:49,039 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:49,053 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:32:49,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:32:49,097 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:32:49,144 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:32:49,145 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:32:49,145 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:32:49,145 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:32:49,146 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:32:49,146 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:32:49,146 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:32:49,146 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:32:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-24 18:32:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-24 18:32:49,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:32:49,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:32:49,269 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:32:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:32:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2948384, now seen corresponding path program 1 times [2020-09-24 18:32:49,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:32:49,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713132501] [2020-09-24 18:32:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:32:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:51,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:52,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:53,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:53,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:53,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:54,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:55,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:55,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-24 18:32:55,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:32:55,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 18:32:55,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:55,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:32:55,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 378 [2020-09-24 18:32:55,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 500 [2020-09-24 18:32:55,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:32:56,666 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 18:32:56,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:32:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:56,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:56,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:56,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 18:32:56,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:32:56,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 18:32:56,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:56,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:32:56,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:32:56,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:32:56,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:32:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:32:58,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713132501] [2020-09-24 18:32:58,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:32:58,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:32:58,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516746206] [2020-09-24 18:32:58,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:32:58,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:32:58,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:32:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:32:58,048 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 4 states. [2020-09-24 18:33:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:07,672 INFO L93 Difference]: Finished difference Result 3387 states and 4474 transitions. [2020-09-24 18:33:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:33:07,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 908 [2020-09-24 18:33:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:07,726 INFO L225 Difference]: With dead ends: 3387 [2020-09-24 18:33:07,726 INFO L226 Difference]: Without dead ends: 2783 [2020-09-24 18:33:07,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-09-24 18:33:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2770. [2020-09-24 18:33:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-09-24 18:33:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3483 transitions. [2020-09-24 18:33:07,920 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3483 transitions. Word has length 908 [2020-09-24 18:33:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:07,925 INFO L479 AbstractCegarLoop]: Abstraction has 2770 states and 3483 transitions. [2020-09-24 18:33:07,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:33:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3483 transitions. [2020-09-24 18:33:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-24 18:33:07,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:07,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:33:07,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:33:07,962 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash -4225536, now seen corresponding path program 1 times [2020-09-24 18:33:07,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:07,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368057323] [2020-09-24 18:33:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:08,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:10,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:10,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:13,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:13,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-24 18:33:13,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:33:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 18:33:13,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:33:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 282 [2020-09-24 18:33:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-09-24 18:33:13,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:14,148 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 18:33:14,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:14,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:14,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 18:33:14,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:14,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 18:33:14,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:33:14,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368057323] [2020-09-24 18:33:14,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:14,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:33:14,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20876269] [2020-09-24 18:33:15,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:33:15,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:15,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:33:15,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:33:15,003 INFO L87 Difference]: Start difference. First operand 2770 states and 3483 transitions. Second operand 5 states. [2020-09-24 18:33:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:28,996 INFO L93 Difference]: Finished difference Result 7524 states and 9572 transitions. [2020-09-24 18:33:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:33:28,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 908 [2020-09-24 18:33:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:29,022 INFO L225 Difference]: With dead ends: 7524 [2020-09-24 18:33:29,022 INFO L226 Difference]: Without dead ends: 5133 [2020-09-24 18:33:29,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:33:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2020-09-24 18:33:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 5131. [2020-09-24 18:33:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5131 states. [2020-09-24 18:33:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 6494 transitions. [2020-09-24 18:33:29,205 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 6494 transitions. Word has length 908 [2020-09-24 18:33:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:29,206 INFO L479 AbstractCegarLoop]: Abstraction has 5131 states and 6494 transitions. [2020-09-24 18:33:29,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:33:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 6494 transitions. [2020-09-24 18:33:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2020-09-24 18:33:29,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:29,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:33:29,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:33:29,225 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2035049638, now seen corresponding path program 1 times [2020-09-24 18:33:29,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:29,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925041118] [2020-09-24 18:33:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:30,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:30,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:30,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:31,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:31,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking...