/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:58:38,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:58:38,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:58:38,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:58:38,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:58:38,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:58:38,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:58:38,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:58:38,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:58:38,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:58:38,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:58:38,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:58:38,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:58:38,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:58:38,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:58:38,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:58:38,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:58:38,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:58:38,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:58:38,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:58:38,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:58:38,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:58:38,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:58:38,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:58:38,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:58:38,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:58:38,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:58:38,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:58:38,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:58:38,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:58:38,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:58:38,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:58:38,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:58:38,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:58:38,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:58:38,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:58:38,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:58:38,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:58:38,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:58:38,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:58:38,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:58:38,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:58:38,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:58:38,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:58:38,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:58:38,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:58:38,286 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:58:38,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:58:38,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:58:38,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:58:38,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:58:38,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:58:38,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:58:38,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:58:38,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:58:38,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:58:38,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:58:38,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:58:38,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:58:38,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:58:38,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:58:38,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:58:38,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:58:38,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:58:38,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:58:38,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:58:38,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:58:38,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:58:38,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:58:38,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:58:38,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:58:38,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:58:38,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:58:38,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:58:38,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:58:38,786 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:58:38,787 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:58:38,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:58:38,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e0757707/ac0e9bf2e966441188be0650c5ac3d22/FLAGf6b3475de [2020-10-28 18:58:39,905 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:58:39,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:58:39,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e0757707/ac0e9bf2e966441188be0650c5ac3d22/FLAGf6b3475de [2020-10-28 18:58:40,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e0757707/ac0e9bf2e966441188be0650c5ac3d22 [2020-10-28 18:58:40,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:58:40,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:58:40,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:58:40,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:58:40,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:58:40,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:58:40" (1/1) ... [2020-10-28 18:58:40,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f83871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:40, skipping insertion in model container [2020-10-28 18:58:40,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:58:40" (1/1) ... [2020-10-28 18:58:40,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:58:40,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:58:41,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:58:41,926 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:58:42,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:58:42,617 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:58:42,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42 WrapperNode [2020-10-28 18:58:42,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:58:42,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:58:42,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:58:42,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:58:42,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... [2020-10-28 18:58:42,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... [2020-10-28 18:58:42,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... [2020-10-28 18:58:42,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... [2020-10-28 18:58:42,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... [2020-10-28 18:58:42,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... [2020-10-28 18:58:42,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... [2020-10-28 18:58:43,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:58:43,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:58:43,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:58:43,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:58:43,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:58:43,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:58:43,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:58:43,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:58:43,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:58:43,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:58:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:58:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:58:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:58:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:58:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:58:43,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:58:43,093 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:58:43,093 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:58:43,093 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:58:43,093 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:58:43,094 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:58:43,094 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:58:43,094 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:58:43,094 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:58:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:58:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:58:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:58:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:58:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:58:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:58:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:58:43,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:58:43,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:58:48,761 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:58:48,761 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:58:48,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:58:48 BoogieIcfgContainer [2020-10-28 18:58:48,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:58:48,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:58:48,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:58:48,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:58:48,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:58:40" (1/3) ... [2020-10-28 18:58:48,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a6bdb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:58:48, skipping insertion in model container [2020-10-28 18:58:48,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:42" (2/3) ... [2020-10-28 18:58:48,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a6bdb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:58:48, skipping insertion in model container [2020-10-28 18:58:48,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:58:48" (3/3) ... [2020-10-28 18:58:48,778 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:58:48,791 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:58:48,797 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:58:48,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:58:48,855 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:58:48,856 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:58:48,856 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:58:48,856 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:58:48,856 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:58:48,856 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:58:48,856 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:58:48,857 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:58:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states. [2020-10-28 18:58:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:58:48,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:48,941 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] [2020-10-28 18:58:48,941 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1580064396, now seen corresponding path program 1 times [2020-10-28 18:58:48,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:48,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074246103] [2020-10-28 18:58:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:49,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:50,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:50,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:53,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:54,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:54,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:58:54,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:58:54,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 18:58:54,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:54,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:58:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:58:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:58:54,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:58:57,733 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 18:58:57,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:57,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:57,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:57,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:57,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:57,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 18:58:57,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:57,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:57,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:57,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:57,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:58:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:57,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074246103] [2020-10-28 18:58:57,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:57,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:58:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186382910] [2020-10-28 18:58:57,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:58:58,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:58:58,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:58:58,020 INFO L87 Difference]: Start difference. First operand 2055 states. Second operand 6 states. [2020-10-28 18:59:00,922 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-28 18:59:21,889 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 687 [2020-10-28 18:59:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:22,575 INFO L93 Difference]: Finished difference Result 3324 states and 5771 transitions. [2020-10-28 18:59:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:59:22,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 18:59:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:22,622 INFO L225 Difference]: With dead ends: 3324 [2020-10-28 18:59:22,622 INFO L226 Difference]: Without dead ends: 2139 [2020-10-28 18:59:22,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:59:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2020-10-28 18:59:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2125. [2020-10-28 18:59:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2125 states. [2020-10-28 18:59:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 2767 transitions. [2020-10-28 18:59:22,824 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 2767 transitions. Word has length 70 [2020-10-28 18:59:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:22,826 INFO L481 AbstractCegarLoop]: Abstraction has 2125 states and 2767 transitions. [2020-10-28 18:59:22,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:59:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 2767 transitions. [2020-10-28 18:59:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:59:22,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:22,836 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] [2020-10-28 18:59:22,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:59:22,837 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1727466358, now seen corresponding path program 1 times [2020-10-28 18:59:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:22,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809652335] [2020-10-28 18:59:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:22,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:23,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:23,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:23,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:27,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:59:27,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:59:27,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 18:59:27,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:27,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:59:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:59:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:59:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:30,907 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 18:59:30,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:30,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:30,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:30,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:30,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:59:30,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:30,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:30,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:30,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:30,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:30,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:31,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809652335] [2020-10-28 18:59:31,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:31,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:59:31,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415548934] [2020-10-28 18:59:31,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:59:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:31,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:59:31,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:59:31,013 INFO L87 Difference]: Start difference. First operand 2125 states and 2767 transitions. Second operand 6 states. [2020-10-28 18:59:33,796 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 683 [2020-10-28 18:59:50,363 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-28 18:59:54,337 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 683 [2020-10-28 18:59:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:57,602 INFO L93 Difference]: Finished difference Result 5869 states and 7917 transitions. [2020-10-28 18:59:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:59:57,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 18:59:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:57,631 INFO L225 Difference]: With dead ends: 5869 [2020-10-28 18:59:57,631 INFO L226 Difference]: Without dead ends: 5628 [2020-10-28 18:59:57,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:59:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2020-10-28 18:59:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4811. [2020-10-28 18:59:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4811 states. [2020-10-28 18:59:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6368 transitions. [2020-10-28 18:59:57,861 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6368 transitions. Word has length 71 [2020-10-28 18:59:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:57,861 INFO L481 AbstractCegarLoop]: Abstraction has 4811 states and 6368 transitions. [2020-10-28 18:59:57,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:59:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6368 transitions. [2020-10-28 18:59:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:59:57,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:57,872 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] [2020-10-28 18:59:57,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:59:57,873 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 53553894, now seen corresponding path program 1 times [2020-10-28 18:59:57,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:57,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471252324] [2020-10-28 18:59:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:57,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:58,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:58,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:01,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:02,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:02,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:00:02,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:00:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:00:02,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:02,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 19:00:02,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:05,763 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 19:00:05,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:05,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:05,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:05,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:05,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 19:00:05,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:05,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:05,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:05,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:05,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:05,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:05,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471252324] [2020-10-28 19:00:05,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:05,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:00:05,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050627328] [2020-10-28 19:00:05,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:05,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:05,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:05,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:05,971 INFO L87 Difference]: Start difference. First operand 4811 states and 6368 transitions. Second operand 6 states. [2020-10-28 19:00:08,790 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-28 19:00:22,659 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 687 [2020-10-28 19:00:24,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:24,583 INFO L93 Difference]: Finished difference Result 10140 states and 13470 transitions. [2020-10-28 19:00:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:00:24,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 19:00:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:24,615 INFO L225 Difference]: With dead ends: 10140 [2020-10-28 19:00:24,615 INFO L226 Difference]: Without dead ends: 6614 [2020-10-28 19:00:24,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:00:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6614 states. [2020-10-28 19:00:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6614 to 6600. [2020-10-28 19:00:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6600 states. [2020-10-28 19:00:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 8632 transitions. [2020-10-28 19:00:24,918 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 8632 transitions. Word has length 71 [2020-10-28 19:00:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:24,920 INFO L481 AbstractCegarLoop]: Abstraction has 6600 states and 8632 transitions. [2020-10-28 19:00:24,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:00:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 8632 transitions. [2020-10-28 19:00:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:00:24,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:24,933 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] [2020-10-28 19:00:24,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:00:24,933 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash -790270772, now seen corresponding path program 1 times [2020-10-28 19:00:24,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:24,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545053067] [2020-10-28 19:00:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:25,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:25,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:25,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:25,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:26,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:26,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:29,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:29,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:29,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:30,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:30,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:00:30,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:00:30,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:00:30,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:30,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 19:00:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:32,925 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 19:00:32,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:32,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:33,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:33,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:33,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:33,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 19:00:33,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:33,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:33,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545053067] [2020-10-28 19:00:33,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:33,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:00:33,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391396836] [2020-10-28 19:00:33,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:33,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:33,108 INFO L87 Difference]: Start difference. First operand 6600 states and 8632 transitions. Second operand 6 states. [2020-10-28 19:00:35,946 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 691 [2020-10-28 19:00:50,062 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 689 [2020-10-28 19:00:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:51,776 INFO L93 Difference]: Finished difference Result 7337 states and 9709 transitions. [2020-10-28 19:00:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:00:51,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 19:00:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:51,802 INFO L225 Difference]: With dead ends: 7337 [2020-10-28 19:00:51,802 INFO L226 Difference]: Without dead ends: 4357 [2020-10-28 19:00:51,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:00:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2020-10-28 19:00:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 3953. [2020-10-28 19:00:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3953 states. [2020-10-28 19:00:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 5090 transitions. [2020-10-28 19:00:51,999 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 5090 transitions. Word has length 72 [2020-10-28 19:00:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:52,000 INFO L481 AbstractCegarLoop]: Abstraction has 3953 states and 5090 transitions. [2020-10-28 19:00:52,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:00:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 5090 transitions. [2020-10-28 19:00:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:00:52,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:52,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:52,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:00:52,009 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:52,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1333751677, now seen corresponding path program 1 times [2020-10-28 19:00:52,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:52,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776048232] [2020-10-28 19:00:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:52,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:55,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:55,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:57,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:57,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:00:57,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:00:57,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 19:00:57,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:57,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:00:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:00:57,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 19:00:57,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:00,103 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 19:01:00,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:00,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:00,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:01:00,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:00,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:00,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776048232] [2020-10-28 19:01:00,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:00,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:01:00,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698562320] [2020-10-28 19:01:00,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:01:00,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:00,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:01:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:01:00,215 INFO L87 Difference]: Start difference. First operand 3953 states and 5090 transitions. Second operand 9 states. [2020-10-28 19:01:03,113 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 689 [2020-10-28 19:01:13,972 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 691 [2020-10-28 19:01:18,236 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-28 19:01:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:19,626 INFO L93 Difference]: Finished difference Result 7147 states and 9735 transitions. [2020-10-28 19:01:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:01:19,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-28 19:01:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:19,648 INFO L225 Difference]: With dead ends: 7147 [2020-10-28 19:01:19,648 INFO L226 Difference]: Without dead ends: 5147 [2020-10-28 19:01:19,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-28 19:01:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2020-10-28 19:01:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 3567. [2020-10-28 19:01:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3567 states. [2020-10-28 19:01:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3567 states to 3567 states and 4666 transitions. [2020-10-28 19:01:19,859 INFO L78 Accepts]: Start accepts. Automaton has 3567 states and 4666 transitions. Word has length 72 [2020-10-28 19:01:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:19,859 INFO L481 AbstractCegarLoop]: Abstraction has 3567 states and 4666 transitions. [2020-10-28 19:01:19,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 19:01:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3567 states and 4666 transitions. [2020-10-28 19:01:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:01:19,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:19,865 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] [2020-10-28 19:01:19,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:01:19,866 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1500653990, now seen corresponding path program 1 times [2020-10-28 19:01:19,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:19,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067249820] [2020-10-28 19:01:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:20,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:20,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:21,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:23,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:24,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:24,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:01:24,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:01:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 19:01:24,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:24,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:01:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 19:01:24,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:27,830 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 19:01:27,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:27,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:27,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:27,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:27,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:27,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 19:01:27,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:27,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:27,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:27,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067249820] [2020-10-28 19:01:27,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:27,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:01:27,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500860872] [2020-10-28 19:01:27,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 19:01:27,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 19:01:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:01:27,992 INFO L87 Difference]: Start difference. First operand 3567 states and 4666 transitions. Second operand 10 states. [2020-10-28 19:01:30,937 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 695 [2020-10-28 19:01:43,311 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 691 [2020-10-28 19:01:47,525 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 689 [2020-10-28 19:01:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:48,038 INFO L93 Difference]: Finished difference Result 3614 states and 4711 transitions. [2020-10-28 19:01:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:01:48,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-28 19:01:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:48,055 INFO L225 Difference]: With dead ends: 3614 [2020-10-28 19:01:48,055 INFO L226 Difference]: Without dead ends: 3607 [2020-10-28 19:01:48,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2020-10-28 19:01:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3607 states. [2020-10-28 19:01:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3607 to 3567. [2020-10-28 19:01:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3567 states. [2020-10-28 19:01:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3567 states to 3567 states and 4665 transitions. [2020-10-28 19:01:48,283 INFO L78 Accepts]: Start accepts. Automaton has 3567 states and 4665 transitions. Word has length 73 [2020-10-28 19:01:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:48,284 INFO L481 AbstractCegarLoop]: Abstraction has 3567 states and 4665 transitions. [2020-10-28 19:01:48,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 19:01:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3567 states and 4665 transitions. [2020-10-28 19:01:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:01:48,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:48,290 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] [2020-10-28 19:01:48,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:01:48,290 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1542375532, now seen corresponding path program 1 times [2020-10-28 19:01:48,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:48,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203736579] [2020-10-28 19:01:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:48,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:48,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:48,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:48,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:49,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:49,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:49,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:50,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:51,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:53,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:53,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:01:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:56,161 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 19:01:56,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:56,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:56,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:56,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203736579] [2020-10-28 19:01:56,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:56,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:01:56,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729829057] [2020-10-28 19:01:56,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:01:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:01:56,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:01:56,259 INFO L87 Difference]: Start difference. First operand 3567 states and 4665 transitions. Second operand 6 states. [2020-10-28 19:01:59,087 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 691 [2020-10-28 19:02:08,960 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 689 [2020-10-28 19:02:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:10,405 INFO L93 Difference]: Finished difference Result 7320 states and 9736 transitions. [2020-10-28 19:02:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:02:10,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 19:02:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:10,418 INFO L225 Difference]: With dead ends: 7320 [2020-10-28 19:02:10,418 INFO L226 Difference]: Without dead ends: 5102 [2020-10-28 19:02:10,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:02:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2020-10-28 19:02:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 5096. [2020-10-28 19:02:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5096 states. [2020-10-28 19:02:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5096 states to 5096 states and 6714 transitions. [2020-10-28 19:02:10,780 INFO L78 Accepts]: Start accepts. Automaton has 5096 states and 6714 transitions. Word has length 73 [2020-10-28 19:02:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:10,780 INFO L481 AbstractCegarLoop]: Abstraction has 5096 states and 6714 transitions. [2020-10-28 19:02:10,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:02:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 5096 states and 6714 transitions. [2020-10-28 19:02:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:02:10,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:10,787 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] [2020-10-28 19:02:10,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:02:10,787 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:10,788 INFO L82 PathProgramCache]: Analyzing trace with hash -806695831, now seen corresponding path program 1 times [2020-10-28 19:02:10,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:10,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919225510] [2020-10-28 19:02:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:10,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:11,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:11,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:15,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:15,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:02:15,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:02:15,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4347 [2020-10-28 19:02:15,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:15,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:02:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:02:15,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:02:15,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:18,083 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 19:02:18,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:18,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:18,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:18,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:18,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:18,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 19:02:18,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:18,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:18,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:18,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919225510] [2020-10-28 19:02:18,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:18,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:02:18,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074886496] [2020-10-28 19:02:18,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:02:18,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:02:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:02:18,196 INFO L87 Difference]: Start difference. First operand 5096 states and 6714 transitions. Second operand 9 states.