/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.7.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:46:42,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:46:42,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:46:42,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:46:42,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:46:42,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:46:42,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:46:42,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:46:42,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:46:42,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:46:42,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:46:42,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:46:42,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:46:42,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:46:42,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:46:42,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:46:42,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:46:42,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:46:42,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:46:42,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:46:42,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:46:42,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:46:42,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:46:42,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:46:42,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:46:42,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:46:42,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:46:42,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:46:42,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:46:42,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:46:42,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:46:42,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:46:42,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:46:42,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:46:42,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:46:42,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:46:42,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:46:42,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:46:42,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:46:42,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:46:42,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:46:42,684 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 18:46:42,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:46:42,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:46:42,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:46:42,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:46:42,736 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:46:42,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:46:42,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:46:42,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:46:42,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:46:42,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:46:42,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:46:42,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:46:42,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:46:42,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:46:42,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:46:42,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:46:42,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:46:42,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:46:42,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:46:42,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:46:42,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:46:42,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:46:42,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:46:42,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:46:42,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:46:42,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:46:42,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:46:42,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:46:42,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:46:42,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:46:43,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:46:43,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:46:43,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:46:43,158 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:46:43,158 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:46:43,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:46:43,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26ff419bc/5dd4507290154f4789427bafcdba4834/FLAGf21334fc8 [2020-10-28 18:46:44,379 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:46:44,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:46:44,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26ff419bc/5dd4507290154f4789427bafcdba4834/FLAGf21334fc8 [2020-10-28 18:46:44,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26ff419bc/5dd4507290154f4789427bafcdba4834 [2020-10-28 18:46:44,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:46:44,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:46:44,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:46:44,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:46:44,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:46:44,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:46:44" (1/1) ... [2020-10-28 18:46:44,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e96afe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:44, skipping insertion in model container [2020-10-28 18:46:44,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:46:44" (1/1) ... [2020-10-28 18:46:44,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:46:45,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:46:48,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:46:48,101 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:46:49,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:46:49,982 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:46:49,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49 WrapperNode [2020-10-28 18:46:49,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:46:49,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:46:49,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:46:49,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:46:50,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (1/1) ... [2020-10-28 18:46:50,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (1/1) ... [2020-10-28 18:46:50,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (1/1) ... [2020-10-28 18:46:50,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (1/1) ... [2020-10-28 18:46:50,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (1/1) ... [2020-10-28 18:46:50,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (1/1) ... [2020-10-28 18:46:50,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (1/1) ... [2020-10-28 18:46:50,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:46:50,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:46:50,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:46:50,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:46:50,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (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 18:46:50,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:46:50,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:46:50,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:46:50,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:46:50,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:46:50,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:46:50,602 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:46:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:46:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:46:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:46:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:46:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:46:50,604 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:46:50,604 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:46:50,604 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:46:50,604 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:46:50,604 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:46:50,604 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:46:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:46:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:46:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:46:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 18:46:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-28 18:46:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:46:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:46:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:46:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:46:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:46:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:46:50,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:46:50,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:46:50,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:47:04,638 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:47:04,639 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:47:04,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:47:04 BoogieIcfgContainer [2020-10-28 18:47:04,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:47:04,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:47:04,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:47:04,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:47:04,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:46:44" (1/3) ... [2020-10-28 18:47:04,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:47:04, skipping insertion in model container [2020-10-28 18:47:04,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:46:49" (2/3) ... [2020-10-28 18:47:04,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:47:04, skipping insertion in model container [2020-10-28 18:47:04,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:47:04" (3/3) ... [2020-10-28 18:47:04,662 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:47:04,674 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:47:04,682 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:47:04,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:47:04,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:47:04,742 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:47:04,742 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:47:04,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:47:04,743 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:47:04,743 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:47:04,743 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:47:04,743 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:47:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5032 states. [2020-10-28 18:47:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 18:47:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:47:04,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:47:04,884 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:47:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:47:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash -338627366, now seen corresponding path program 1 times [2020-10-28 18:47:04,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:47:04,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13890937] [2020-10-28 18:47:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:47:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:05,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:06,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:06,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:06,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:09,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:10,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:10,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 18:47:10,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:47:10,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 18:47:10,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:10,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:47:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:47:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 18:47:10,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:47:14,633 WARN L193 SmtUtils]: Spent 3.60 s on a formula simplification that was a NOOP. DAG size: 775 [2020-10-28 18:47:14,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:47:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:14,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:14,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:14,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:47:14,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:47:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 18:47:14,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:14,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:47:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:47:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:47:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:47:15,041 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 18:47:15,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13890937] [2020-10-28 18:47:15,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:47:15,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:47:15,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723653570] [2020-10-28 18:47:15,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:47:15,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:47:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:47:15,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:47:15,067 INFO L87 Difference]: Start difference. First operand 5032 states. Second operand 6 states. [2020-10-28 18:47:19,101 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification that was a NOOP. DAG size: 784 [2020-10-28 18:48:11,388 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification that was a NOOP. DAG size: 782 [2020-10-28 18:48:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:13,222 INFO L93 Difference]: Finished difference Result 7265 states and 12911 transitions. [2020-10-28 18:48:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:48:13,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2020-10-28 18:48:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:13,273 INFO L225 Difference]: With dead ends: 7265 [2020-10-28 18:48:13,273 INFO L226 Difference]: Without dead ends: 4743 [2020-10-28 18:48:13,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:48:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2020-10-28 18:48:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 4559. [2020-10-28 18:48:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4559 states. [2020-10-28 18:48:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 6170 transitions. [2020-10-28 18:48:13,543 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 6170 transitions. Word has length 106 [2020-10-28 18:48:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:13,544 INFO L481 AbstractCegarLoop]: Abstraction has 4559 states and 6170 transitions. [2020-10-28 18:48:13,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:48:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 6170 transitions. [2020-10-28 18:48:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 18:48:13,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:13,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:13,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:48:13,562 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:13,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1813272010, now seen corresponding path program 1 times [2020-10-28 18:48:13,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:13,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302709845] [2020-10-28 18:48:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:13,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:13,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:14,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:14,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:14,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:15,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:18,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:18,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 18:48:18,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:48:18,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-28 18:48:18,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:18,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:48:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:48:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 18:48:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:48:22,786 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification that was a NOOP. DAG size: 775 [2020-10-28 18:48:22,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:22,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:22,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:22,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:22,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:22,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-28 18:48:22,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:22,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:22,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:48:22,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:48:23,067 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 18:48:23,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302709845] [2020-10-28 18:48:23,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:23,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:48:23,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285665341] [2020-10-28 18:48:23,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:48:23,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:48:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:48:23,075 INFO L87 Difference]: Start difference. First operand 4559 states and 6170 transitions. Second operand 6 states. [2020-10-28 18:48:26,999 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification that was a NOOP. DAG size: 784 [2020-10-28 18:48:59,500 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 782 [2020-10-28 18:49:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:01,065 INFO L93 Difference]: Finished difference Result 7672 states and 10517 transitions. [2020-10-28 18:49:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:49:01,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2020-10-28 18:49:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:01,099 INFO L225 Difference]: With dead ends: 7672 [2020-10-28 18:49:01,099 INFO L226 Difference]: Without dead ends: 5808 [2020-10-28 18:49:01,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:49:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2020-10-28 18:49:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5708. [2020-10-28 18:49:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5708 states. [2020-10-28 18:49:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 7935 transitions. [2020-10-28 18:49:01,347 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 7935 transitions. Word has length 106 [2020-10-28 18:49:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:01,350 INFO L481 AbstractCegarLoop]: Abstraction has 5708 states and 7935 transitions. [2020-10-28 18:49:01,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:49:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 7935 transitions. [2020-10-28 18:49:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 18:49:01,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:01,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:01,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:49:01,367 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash 237246224, now seen corresponding path program 1 times [2020-10-28 18:49:01,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:01,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301565271] [2020-10-28 18:49:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:01,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:01,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:02,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:06,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:06,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 18:49:06,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:49:06,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 18:49:06,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:06,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:49:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:49:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 18:49:06,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:10,502 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification that was a NOOP. DAG size: 775 [2020-10-28 18:49:10,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:10,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:10,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:10,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:10,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:10,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 18:49:10,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:10,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:10,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:49:10,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:10,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:49:10,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:10,624 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 18:49:10,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301565271] [2020-10-28 18:49:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:10,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:49:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694740833] [2020-10-28 18:49:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:49:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:49:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:49:10,627 INFO L87 Difference]: Start difference. First operand 5708 states and 7935 transitions. Second operand 7 states. [2020-10-28 18:49:14,606 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification that was a NOOP. DAG size: 779 [2020-10-28 18:49:54,790 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification that was a NOOP. DAG size: 779 [2020-10-28 18:49:59,404 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification that was a NOOP. DAG size: 781 [2020-10-28 18:50:06,207 WARN L193 SmtUtils]: Spent 3.69 s on a formula simplification that was a NOOP. DAG size: 777 [2020-10-28 18:50:10,533 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification that was a NOOP. DAG size: 776 [2020-10-28 18:50:16,386 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification that was a NOOP. DAG size: 779 [2020-10-28 18:50:20,263 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification that was a NOOP. DAG size: 778 [2020-10-28 18:50:24,371 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 780 [2020-10-28 18:50:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:24,412 INFO L93 Difference]: Finished difference Result 14733 states and 20782 transitions. [2020-10-28 18:50:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:50:24,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2020-10-28 18:50:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:24,470 INFO L225 Difference]: With dead ends: 14733 [2020-10-28 18:50:24,470 INFO L226 Difference]: Without dead ends: 13460 [2020-10-28 18:50:24,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 18:50:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13460 states. [2020-10-28 18:50:24,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13460 to 8871. [2020-10-28 18:50:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8871 states. [2020-10-28 18:50:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8871 states to 8871 states and 12454 transitions. [2020-10-28 18:50:24,963 INFO L78 Accepts]: Start accepts. Automaton has 8871 states and 12454 transitions. Word has length 106 [2020-10-28 18:50:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:24,964 INFO L481 AbstractCegarLoop]: Abstraction has 8871 states and 12454 transitions. [2020-10-28 18:50:24,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:50:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8871 states and 12454 transitions. [2020-10-28 18:50:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 18:50:24,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:24,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:24,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:50:24,985 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash 954728136, now seen corresponding path program 1 times [2020-10-28 18:50:24,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:24,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103010723] [2020-10-28 18:50:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:25,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:25,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:25,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:25,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:27,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:27,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:28,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking...