/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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:59:11,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:59:11,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:59:11,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:59:11,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:59:11,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:59:11,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:59:11,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:59:11,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:59:11,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:59:11,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:59:11,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:59:11,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:59:11,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:59:11,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:59:11,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:59:11,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:59:11,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:59:11,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:59:11,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:59:11,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:59:11,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:59:11,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:59:11,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:59:11,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:59:11,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:59:11,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:59:11,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:59:11,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:59:11,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:59:11,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:59:11,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:59:11,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:59:11,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:59:11,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:59:11,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:59:11,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:59:11,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:59:11,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:59:11,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:59:11,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:59:11,759 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 18:59:11,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:59:11,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:59:11,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:59:11,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:59:11,816 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:59:11,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:59:11,817 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:59:11,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:59:11,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:59:11,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:59:11,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:59:11,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:59:11,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:59:11,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:59:11,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:59:11,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:59:11,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:59:11,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:59:11,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:59:11,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:59:11,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:59:11,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:59:11,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:59:11,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:59:11,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:59:11,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:59:11,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:59:11,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:59:11,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:59:11,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:59:12,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:59:12,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:59:12,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:59:12,323 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:59:12,324 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:59:12,325 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:59:12,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f86ea1ec/9afdf664526447e2bbe81247d8fd53ae/FLAG0893e312a [2020-10-28 18:59:13,300 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:59:13,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:59:13,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f86ea1ec/9afdf664526447e2bbe81247d8fd53ae/FLAG0893e312a [2020-10-28 18:59:13,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f86ea1ec/9afdf664526447e2bbe81247d8fd53ae [2020-10-28 18:59:13,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:59:13,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:59:13,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:59:13,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:59:13,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:59:13,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:59:13" (1/1) ... [2020-10-28 18:59:13,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612cb730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:13, skipping insertion in model container [2020-10-28 18:59:13,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:59:13" (1/1) ... [2020-10-28 18:59:13,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:59:13,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:59:14,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:59:14,399 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:59:14,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:59:14,739 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:59:14,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14 WrapperNode [2020-10-28 18:59:14,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:59:14,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:59:14,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:59:14,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:59:14,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (1/1) ... [2020-10-28 18:59:14,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (1/1) ... [2020-10-28 18:59:14,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (1/1) ... [2020-10-28 18:59:14,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (1/1) ... [2020-10-28 18:59:14,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (1/1) ... [2020-10-28 18:59:14,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (1/1) ... [2020-10-28 18:59:14,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (1/1) ... [2020-10-28 18:59:14,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:59:14,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:59:14,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:59:14,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:59:14,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (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 18:59:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:59:15,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:59:15,068 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:59:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:59:15,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:59:15,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:59:15,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:59:15,070 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:59:15,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:59:15,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:59:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:59:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:59:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:59:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:59:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:59:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:59:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:59:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:59:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:59:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:59:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:59:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:59:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:59:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:59:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:59:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:59:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:59:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:59:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:59:18,052 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:59:18,053 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:59:18,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:59:18 BoogieIcfgContainer [2020-10-28 18:59:18,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:59:18,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:59:18,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:59:18,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:59:18,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:59:13" (1/3) ... [2020-10-28 18:59:18,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2bd6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:59:18, skipping insertion in model container [2020-10-28 18:59:18,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:14" (2/3) ... [2020-10-28 18:59:18,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2bd6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:59:18, skipping insertion in model container [2020-10-28 18:59:18,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:59:18" (3/3) ... [2020-10-28 18:59:18,071 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:59:18,084 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:59:18,095 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:59:18,111 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:59:18,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:59:18,160 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:59:18,160 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:59:18,160 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:59:18,161 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:59:18,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:59:18,161 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:59:18,161 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:59:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states. [2020-10-28 18:59:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:59:18,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:18,245 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] [2020-10-28 18:59:18,245 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:18,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2073257526, now seen corresponding path program 1 times [2020-10-28 18:59:18,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:18,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787959186] [2020-10-28 18:59:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:18,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:19,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:20,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:23,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:23,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:59:23,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:59:23,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:59:23,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:23,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:59:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:59:23,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:59:24,728 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:59:24,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:24,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:24,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:24,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:24,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 18:59:24,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:24,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:24,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:24,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:24,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:24,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:24,822 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 18:59:24,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787959186] [2020-10-28 18:59:24,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:24,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:24,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777451099] [2020-10-28 18:59:24,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:24,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:24,849 INFO L87 Difference]: Start difference. First operand 711 states. Second operand 4 states. [2020-10-28 18:59:25,914 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 18:59:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:31,868 INFO L93 Difference]: Finished difference Result 1075 states and 1865 transitions. [2020-10-28 18:59:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:31,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:59:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:31,901 INFO L225 Difference]: With dead ends: 1075 [2020-10-28 18:59:31,902 INFO L226 Difference]: Without dead ends: 847 [2020-10-28 18:59:31,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2020-10-28 18:59:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 844. [2020-10-28 18:59:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-10-28 18:59:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1155 transitions. [2020-10-28 18:59:32,042 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1155 transitions. Word has length 67 [2020-10-28 18:59:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:32,044 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1155 transitions. [2020-10-28 18:59:32,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1155 transitions. [2020-10-28 18:59:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:59:32,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:32,053 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] [2020-10-28 18:59:32,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:59:32,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312785, now seen corresponding path program 1 times [2020-10-28 18:59:32,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:32,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407663781] [2020-10-28 18:59:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:32,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:34,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:34,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:34,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:36,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:36,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:37,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:37,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:59:37,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:59:37,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 18:59:37,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:37,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:37,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 18:59:37,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:59:37,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:38,018 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:59:38,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:38,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:38,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:38,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:38,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:38,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:59:38,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:38,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:38,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:38,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:38,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:38,091 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 18:59:38,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407663781] [2020-10-28 18:59:38,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:38,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346331516] [2020-10-28 18:59:38,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:38,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:38,095 INFO L87 Difference]: Start difference. First operand 844 states and 1155 transitions. Second operand 4 states. [2020-10-28 18:59:39,006 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 18:59:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:43,621 INFO L93 Difference]: Finished difference Result 1465 states and 2029 transitions. [2020-10-28 18:59:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:43,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:59:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:43,630 INFO L225 Difference]: With dead ends: 1465 [2020-10-28 18:59:43,631 INFO L226 Difference]: Without dead ends: 1225 [2020-10-28 18:59:43,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2020-10-28 18:59:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1221. [2020-10-28 18:59:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2020-10-28 18:59:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1657 transitions. [2020-10-28 18:59:43,707 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1657 transitions. Word has length 68 [2020-10-28 18:59:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:43,708 INFO L481 AbstractCegarLoop]: Abstraction has 1221 states and 1657 transitions. [2020-10-28 18:59:43,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1657 transitions. [2020-10-28 18:59:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:59:43,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:43,712 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] [2020-10-28 18:59:43,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:59:43,712 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1637171391, now seen corresponding path program 1 times [2020-10-28 18:59:43,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:43,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131373993] [2020-10-28 18:59:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:43,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:43,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:43,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:44,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:44,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:45,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:45,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:45,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:48,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:48,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:59:48,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:59:48,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 18:59:48,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:48,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:48,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 18:59:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:59:48,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:49,676 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:59:49,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:49,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:49,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:49,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:59:49,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:49,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:49,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:49,743 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 18:59:49,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131373993] [2020-10-28 18:59:49,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:49,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:49,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165569714] [2020-10-28 18:59:49,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:49,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:49,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:49,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:49,747 INFO L87 Difference]: Start difference. First operand 1221 states and 1657 transitions. Second operand 4 states. [2020-10-28 18:59:50,659 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 18:59:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:54,983 INFO L93 Difference]: Finished difference Result 2219 states and 3121 transitions. [2020-10-28 18:59:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:54,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:59:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:54,994 INFO L225 Difference]: With dead ends: 2219 [2020-10-28 18:59:54,994 INFO L226 Difference]: Without dead ends: 1688 [2020-10-28 18:59:54,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2020-10-28 18:59:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1684. [2020-10-28 18:59:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1684 states. [2020-10-28 18:59:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2319 transitions. [2020-10-28 18:59:55,072 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2319 transitions. Word has length 68 [2020-10-28 18:59:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:55,073 INFO L481 AbstractCegarLoop]: Abstraction has 1684 states and 2319 transitions. [2020-10-28 18:59:55,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2319 transitions. [2020-10-28 18:59:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:59:55,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:55,077 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] [2020-10-28 18:59:55,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:59:55,077 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:55,078 INFO L82 PathProgramCache]: Analyzing trace with hash -864829432, now seen corresponding path program 1 times [2020-10-28 18:59:55,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:55,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390336161] [2020-10-28 18:59:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:55,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:57,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:57,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:58,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:00,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 19:00:00,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:00:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-28 19:00:00,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:00,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:00,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:00,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 19:00:00,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:01,460 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:00:01,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:01,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:01,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:01,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:01,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 19:00:01,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:01,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:01,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:01,581 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 19:00:01,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390336161] [2020-10-28 19:00:01,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:01,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:00:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036289189] [2020-10-28 19:00:01,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:00:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:01,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:00:01,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:00:01,584 INFO L87 Difference]: Start difference. First operand 1684 states and 2319 transitions. Second operand 7 states. [2020-10-28 19:00:02,430 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-28 19:00:07,597 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 19:00:09,798 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 19:00:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:10,028 INFO L93 Difference]: Finished difference Result 4826 states and 7021 transitions. [2020-10-28 19:00:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 19:00:10,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-28 19:00:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:10,054 INFO L225 Difference]: With dead ends: 4826 [2020-10-28 19:00:10,055 INFO L226 Difference]: Without dead ends: 4193 [2020-10-28 19:00:10,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-28 19:00:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2020-10-28 19:00:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 1800. [2020-10-28 19:00:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-10-28 19:00:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2471 transitions. [2020-10-28 19:00:10,200 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2471 transitions. Word has length 68 [2020-10-28 19:00:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:10,200 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 2471 transitions. [2020-10-28 19:00:10,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:00:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2471 transitions. [2020-10-28 19:00:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:00:10,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:10,205 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] [2020-10-28 19:00:10,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:00:10,205 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:10,205 INFO L82 PathProgramCache]: Analyzing trace with hash 227308761, now seen corresponding path program 1 times [2020-10-28 19:00:10,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:10,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071780584] [2020-10-28 19:00:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:10,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:10,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:10,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:10,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:14,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:14,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:15,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:15,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:00:15,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:00:15,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:00:15,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:15,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 19:00:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 19:00:15,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:00:16,241 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:00:16,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:16,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:16,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:16,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:16,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 19:00:16,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:16,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:16,325 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 19:00:16,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071780584] [2020-10-28 19:00:16,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:16,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:00:16,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222565495] [2020-10-28 19:00:16,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:16,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:16,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:16,334 INFO L87 Difference]: Start difference. First operand 1800 states and 2471 transitions. Second operand 6 states. [2020-10-28 19:00:17,211 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-28 19:00:23,512 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-28 19:00:24,553 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-28 19:00:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:26,527 INFO L93 Difference]: Finished difference Result 7876 states and 11335 transitions. [2020-10-28 19:00:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:00:26,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 19:00:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:26,571 INFO L225 Difference]: With dead ends: 7876 [2020-10-28 19:00:26,571 INFO L226 Difference]: Without dead ends: 7192 [2020-10-28 19:00:26,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 19:00:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7192 states. [2020-10-28 19:00:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7192 to 3587. [2020-10-28 19:00:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3587 states. [2020-10-28 19:00:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 5004 transitions. [2020-10-28 19:00:26,833 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 5004 transitions. Word has length 69 [2020-10-28 19:00:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:26,836 INFO L481 AbstractCegarLoop]: Abstraction has 3587 states and 5004 transitions. [2020-10-28 19:00:26,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:00:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 5004 transitions. [2020-10-28 19:00:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:00:26,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:26,842 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 19:00:26,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:00:26,843 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash 282439141, now seen corresponding path program 1 times [2020-10-28 19:00:26,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:26,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538888852] [2020-10-28 19:00:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:27,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:27,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:27,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:27,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:27,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:28,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:28,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:30,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:30,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:31,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:31,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:00:31,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:00:31,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 19:00:31,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:31,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:31,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:31,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 19:00:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:32,939 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:00:32,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:32,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:32,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:32,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:32,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:32,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:00:32,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:32,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:32,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:32,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:33,022 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 19:00:33,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538888852] [2020-10-28 19:00:33,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:33,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:33,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903881629] [2020-10-28 19:00:33,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:33,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:33,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:33,025 INFO L87 Difference]: Start difference. First operand 3587 states and 5004 transitions. Second operand 8 states. [2020-10-28 19:00:33,918 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2020-10-28 19:00:38,994 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 19:00:40,936 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 19:00:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:41,227 INFO L93 Difference]: Finished difference Result 11710 states and 17068 transitions. [2020-10-28 19:00:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:00:41,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 19:00:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:41,279 INFO L225 Difference]: With dead ends: 11710 [2020-10-28 19:00:41,279 INFO L226 Difference]: Without dead ends: 10224 [2020-10-28 19:00:41,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10224 states. [2020-10-28 19:00:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10224 to 3571. [2020-10-28 19:00:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3571 states. [2020-10-28 19:00:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4972 transitions. [2020-10-28 19:00:41,596 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4972 transitions. Word has length 70 [2020-10-28 19:00:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:41,596 INFO L481 AbstractCegarLoop]: Abstraction has 3571 states and 4972 transitions. [2020-10-28 19:00:41,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:00:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4972 transitions. [2020-10-28 19:00:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:00:41,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:41,603 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 19:00:41,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:00:41,603 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1335239324, now seen corresponding path program 1 times [2020-10-28 19:00:41,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:41,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844164950] [2020-10-28 19:00:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:41,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:44,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:44,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:45,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:45,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:45,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:46,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:00:46,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:00:46,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:00:46,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:46,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:46,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:46,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:46,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 19:00:46,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:47,573 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:00:47,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:47,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:47,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:47,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 19:00:47,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:47,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:47,658 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 19:00:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844164950] [2020-10-28 19:00:47,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:47,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:47,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346122537] [2020-10-28 19:00:47,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:47,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:47,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:47,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:47,661 INFO L87 Difference]: Start difference. First operand 3571 states and 4972 transitions. Second operand 8 states. [2020-10-28 19:00:48,549 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 19:00:53,798 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 19:00:55,922 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 19:00:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:56,341 INFO L93 Difference]: Finished difference Result 10495 states and 15219 transitions. [2020-10-28 19:00:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 19:00:56,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 19:00:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:56,365 INFO L225 Difference]: With dead ends: 10495 [2020-10-28 19:00:56,365 INFO L226 Difference]: Without dead ends: 9138 [2020-10-28 19:00:56,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 19:00:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9138 states. [2020-10-28 19:00:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9138 to 3869. [2020-10-28 19:00:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3869 states. [2020-10-28 19:00:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 5400 transitions. [2020-10-28 19:00:56,774 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 5400 transitions. Word has length 70 [2020-10-28 19:00:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:56,775 INFO L481 AbstractCegarLoop]: Abstraction has 3869 states and 5400 transitions. [2020-10-28 19:00:56,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:00:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 5400 transitions. [2020-10-28 19:00:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:00:56,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:56,783 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 19:00:56,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:00:56,783 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1919616521, now seen corresponding path program 1 times [2020-10-28 19:00:56,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:56,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131732691] [2020-10-28 19:00:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:56,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:56,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:57,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:57,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:57,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:01,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:01:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:02,732 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:01:02,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:02,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:02,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:02,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:02,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 19:01:02,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:02,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:02,856 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 19:01:02,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131732691] [2020-10-28 19:01:02,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:02,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:01:02,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246619961] [2020-10-28 19:01:02,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:01:02,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:01:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:01:02,858 INFO L87 Difference]: Start difference. First operand 3869 states and 5400 transitions. Second operand 8 states. [2020-10-28 19:01:03,876 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 19:01:08,877 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 19:01:10,617 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 19:01:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:10,996 INFO L93 Difference]: Finished difference Result 8667 states and 12410 transitions. [2020-10-28 19:01:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:01:10,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 19:01:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:11,014 INFO L225 Difference]: With dead ends: 8667 [2020-10-28 19:01:11,014 INFO L226 Difference]: Without dead ends: 7952 [2020-10-28 19:01:11,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 19:01:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7952 states. [2020-10-28 19:01:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7952 to 3911. [2020-10-28 19:01:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3911 states. [2020-10-28 19:01:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3911 states to 3911 states and 5460 transitions. [2020-10-28 19:01:11,377 INFO L78 Accepts]: Start accepts. Automaton has 3911 states and 5460 transitions. Word has length 70 [2020-10-28 19:01:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:11,378 INFO L481 AbstractCegarLoop]: Abstraction has 3911 states and 5460 transitions. [2020-10-28 19:01:11,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:01:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3911 states and 5460 transitions. [2020-10-28 19:01:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:01:11,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:11,385 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 19:01:11,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:01:11,386 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1929133214, now seen corresponding path program 1 times [2020-10-28 19:01:11,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:11,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586615170] [2020-10-28 19:01:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:11,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:11,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:16,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:16,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:16,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:16,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:01:16,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:01:16,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:01:16,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:16,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:16,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:01:16,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:16,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 19:01:16,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:17,370 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:01:17,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:17,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:17,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:17,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:17,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:17,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 19:01:17,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:17,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:17,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:17,432 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 19:01:17,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586615170] [2020-10-28 19:01:17,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:17,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:01:17,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098190384] [2020-10-28 19:01:17,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:01:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:01:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:01:17,434 INFO L87 Difference]: Start difference. First operand 3911 states and 5460 transitions. Second operand 8 states. [2020-10-28 19:01:18,317 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 19:01:23,421 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 19:01:25,175 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 19:01:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:25,628 INFO L93 Difference]: Finished difference Result 11729 states and 16817 transitions. [2020-10-28 19:01:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 19:01:25,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-28 19:01:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:25,650 INFO L225 Difference]: With dead ends: 11729 [2020-10-28 19:01:25,650 INFO L226 Difference]: Without dead ends: 10032 [2020-10-28 19:01:25,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 19:01:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10032 states. [2020-10-28 19:01:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10032 to 3920. [2020-10-28 19:01:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3920 states. [2020-10-28 19:01:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 5416 transitions. [2020-10-28 19:01:26,080 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 5416 transitions. Word has length 71 [2020-10-28 19:01:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:26,080 INFO L481 AbstractCegarLoop]: Abstraction has 3920 states and 5416 transitions. [2020-10-28 19:01:26,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:01:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 5416 transitions. [2020-10-28 19:01:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:01:26,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:26,088 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 19:01:26,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:01:26,088 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash 408523613, now seen corresponding path program 1 times [2020-10-28 19:01:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:26,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361279988] [2020-10-28 19:01:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:26,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:26,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:26,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:26,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:26,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:26,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:27,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:27,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:27,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:27,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:27,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:28,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:31,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:31,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:01:31,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:01:31,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 19:01:31,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:31,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:01:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 19:01:31,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:32,007 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:01:32,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:32,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:32,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:32,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:32,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:32,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 19:01:32,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:32,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:32,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:32,089 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 19:01:32,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361279988] [2020-10-28 19:01:32,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:32,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:01:32,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433672163] [2020-10-28 19:01:32,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:01:32,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:32,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:01:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:01:32,091 INFO L87 Difference]: Start difference. First operand 3920 states and 5416 transitions. Second operand 6 states. [2020-10-28 19:01:32,990 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 19:01:37,821 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 19:01:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:38,477 INFO L93 Difference]: Finished difference Result 8865 states and 12267 transitions. [2020-10-28 19:01:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:01:38,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 19:01:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:38,487 INFO L225 Difference]: With dead ends: 8865 [2020-10-28 19:01:38,487 INFO L226 Difference]: Without dead ends: 5476 [2020-10-28 19:01:38,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:01:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2020-10-28 19:01:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 5462. [2020-10-28 19:01:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5462 states. [2020-10-28 19:01:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5462 states to 5462 states and 7486 transitions. [2020-10-28 19:01:38,975 INFO L78 Accepts]: Start accepts. Automaton has 5462 states and 7486 transitions. Word has length 72 [2020-10-28 19:01:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:38,975 INFO L481 AbstractCegarLoop]: Abstraction has 5462 states and 7486 transitions. [2020-10-28 19:01:38,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:01:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5462 states and 7486 transitions. [2020-10-28 19:01:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:01:38,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:38,984 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 19:01:38,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:01:38,985 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1137841916, now seen corresponding path program 1 times [2020-10-28 19:01:38,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:38,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272195988] [2020-10-28 19:01:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:39,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:39,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:39,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:39,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:41,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:42,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:42,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:42,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:42,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:43,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:43,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:43,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:44,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 19:01:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:44,915 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:01:44,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:44,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:44,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:44,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:44,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 19:01:44,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:44,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:44,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:44,973 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 19:01:44,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272195988] [2020-10-28 19:01:44,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:44,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:01:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513276206] [2020-10-28 19:01:44,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:01:44,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:01:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:01:44,979 INFO L87 Difference]: Start difference. First operand 5462 states and 7486 transitions. Second operand 6 states. [2020-10-28 19:01:45,875 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-28 19:01:50,876 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-28 19:01:51,950 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-28 19:01:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:55,957 INFO L93 Difference]: Finished difference Result 28723 states and 41285 transitions. [2020-10-28 19:01:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:01:55,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 19:01:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:56,002 INFO L225 Difference]: With dead ends: 28723 [2020-10-28 19:01:56,003 INFO L226 Difference]: Without dead ends: 25123 [2020-10-28 19:01:56,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 19:01:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25123 states. [2020-10-28 19:01:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25123 to 14825. [2020-10-28 19:01:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14825 states. [2020-10-28 19:01:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14825 states to 14825 states and 20873 transitions. [2020-10-28 19:01:57,981 INFO L78 Accepts]: Start accepts. Automaton has 14825 states and 20873 transitions. Word has length 72 [2020-10-28 19:01:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 14825 states and 20873 transitions. [2020-10-28 19:01:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:01:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 14825 states and 20873 transitions. [2020-10-28 19:01:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:01:57,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:57,995 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 19:01:57,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:01:57,997 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:57,997 INFO L82 PathProgramCache]: Analyzing trace with hash 160913584, now seen corresponding path program 1 times [2020-10-28 19:01:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:58,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780557910] [2020-10-28 19:01:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:58,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:58,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:58,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:00,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:00,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:03,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 19:02:03,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:03,968 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:02:03,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:03,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:03,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:03,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:03,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:03,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:02:03,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:03,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:03,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:03,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:03,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:03,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:04,005 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 19:02:04,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780557910] [2020-10-28 19:02:04,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:04,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:02:04,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490005890] [2020-10-28 19:02:04,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:02:04,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:04,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:02:04,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:02:04,007 INFO L87 Difference]: Start difference. First operand 14825 states and 20873 transitions. Second operand 6 states. [2020-10-28 19:02:04,897 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-28 19:02:10,064 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-28 19:02:11,496 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-28 19:02:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:22,122 INFO L93 Difference]: Finished difference Result 100968 states and 147273 transitions. [2020-10-28 19:02:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:02:22,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 19:02:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:22,284 INFO L225 Difference]: With dead ends: 100968 [2020-10-28 19:02:22,284 INFO L226 Difference]: Without dead ends: 86390 [2020-10-28 19:02:22,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 19:02:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86390 states. [2020-10-28 19:02:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86390 to 47492. [2020-10-28 19:02:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47492 states. [2020-10-28 19:02:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47492 states to 47492 states and 68117 transitions. [2020-10-28 19:02:28,982 INFO L78 Accepts]: Start accepts. Automaton has 47492 states and 68117 transitions. Word has length 73 [2020-10-28 19:02:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:28,983 INFO L481 AbstractCegarLoop]: Abstraction has 47492 states and 68117 transitions. [2020-10-28 19:02:28,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:02:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 47492 states and 68117 transitions. [2020-10-28 19:02:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:02:29,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:29,007 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 19:02:29,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:02:29,008 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash 123284138, now seen corresponding path program 1 times [2020-10-28 19:02:29,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:29,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487285356] [2020-10-28 19:02:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:29,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:29,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:29,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:29,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:31,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:31,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:31,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:32,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:33,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:33,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:34,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 19:02:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 19:02:34,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:35,035 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 19:02:35,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:35,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:35,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:35,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:35,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:02:35,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:35,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:35,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:35,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:35,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:35,090 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 19:02:35,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487285356] [2020-10-28 19:02:35,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:35,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:02:35,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693979589] [2020-10-28 19:02:35,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:02:35,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:02:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:02:35,093 INFO L87 Difference]: Start difference. First operand 47492 states and 68117 transitions. Second operand 6 states. [2020-10-28 19:02:36,108 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-28 19:02:41,837 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-28 19:02:42,968 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 332