/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=0.4 --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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:57:31,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:57:31,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:57:31,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:57:31,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:57:31,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:57:31,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:57:31,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:57:31,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:57:31,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:57:31,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:57:31,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:57:31,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:57:31,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:57:31,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:57:31,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:57:31,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:57:31,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:57:31,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:57:31,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:57:31,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:57:31,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:57:31,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:57:31,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:57:31,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:57:31,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:57:31,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:57:31,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:57:31,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:57:31,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:57:31,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:57:31,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:57:31,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:57:31,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:57:31,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:57:31,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:57:31,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:57:31,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:57:31,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:57:31,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:57:31,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:57:31,570 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 [2020-10-14 08:57:31,606 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:57:31,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:57:31,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:57:31,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:57:31,608 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:57:31,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:57:31,609 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:57:31,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:57:31,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:57:31,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:57:31,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:57:31,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:57:31,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:57:31,611 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:57:31,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:57:31,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:57:31,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:57:31,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:57:31,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:57:31,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:57:31,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:57:31,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:57:31,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:57:31,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:57:31,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:57:31,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:57:31,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:57:31,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:57:31,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:57:31,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:57:31,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:57:31,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:57:31,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:57:31,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:57:31,901 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:57:31,901 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-14 08:57:31,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d46700a7/97f0b9b01084430dba9b1a4de68d58a1/FLAG512f33c50 [2020-10-14 08:57:32,695 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:57:32,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-14 08:57:32,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d46700a7/97f0b9b01084430dba9b1a4de68d58a1/FLAG512f33c50 [2020-10-14 08:57:33,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d46700a7/97f0b9b01084430dba9b1a4de68d58a1 [2020-10-14 08:57:33,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:57:33,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:57:33,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:57:33,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:57:33,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:57:33,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:57:33" (1/1) ... [2020-10-14 08:57:33,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e5bb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:33, skipping insertion in model container [2020-10-14 08:57:33,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:57:33" (1/1) ... [2020-10-14 08:57:33,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:57:33,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:57:35,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:57:35,604 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:57:36,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:57:36,779 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:57:36,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36 WrapperNode [2020-10-14 08:57:36,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:57:36,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:57:36,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:57:36,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:57:36,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (1/1) ... [2020-10-14 08:57:36,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (1/1) ... [2020-10-14 08:57:36,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (1/1) ... [2020-10-14 08:57:36,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (1/1) ... [2020-10-14 08:57:36,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (1/1) ... [2020-10-14 08:57:37,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (1/1) ... [2020-10-14 08:57:37,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (1/1) ... [2020-10-14 08:57:37,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:57:37,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:57:37,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:57:37,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:57:37,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (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 [2020-10-14 08:57:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:57:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:57:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:57:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:57:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:57:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:57:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:57:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:57:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:57:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:57:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:57:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:57:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:57:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:57:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:57:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:57:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:57:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:57:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 08:57:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-14 08:57:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:57:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:57:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:57:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:57:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:57:42,511 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:57:42,511 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:57:42,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:57:42 BoogieIcfgContainer [2020-10-14 08:57:42,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:57:42,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:57:42,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:57:42,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:57:42,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:57:33" (1/3) ... [2020-10-14 08:57:42,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f27b3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:57:42, skipping insertion in model container [2020-10-14 08:57:42,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:57:36" (2/3) ... [2020-10-14 08:57:42,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f27b3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:57:42, skipping insertion in model container [2020-10-14 08:57:42,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:57:42" (3/3) ... [2020-10-14 08:57:42,533 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-14 08:57:42,544 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:57:42,552 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 29 error locations. [2020-10-14 08:57:42,566 INFO L251 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2020-10-14 08:57:42,596 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:57:42,597 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:57:42,597 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:57:42,597 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:57:42,597 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:57:42,597 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:57:42,597 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:57:42,598 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:57:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states. [2020-10-14 08:57:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 08:57:42,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:42,674 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] [2020-10-14 08:57:42,675 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash 228731339, now seen corresponding path program 1 times [2020-10-14 08:57:42,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:42,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299715498] [2020-10-14 08:57:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:43,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:44,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:44,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:44,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:46,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:46,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:46,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:47,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:48,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:48,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 08:57:48,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:57:48,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 08:57:48,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:48,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:57:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:57:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 08:57:48,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 08:57:51,143 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 08:57:51,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:51,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:51,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:51,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:51,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:51,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-14 08:57:51,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:51,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:57:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:57:51,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:57:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:57:51,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299715498] [2020-10-14 08:57:51,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:51,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:57:51,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749867714] [2020-10-14 08:57:51,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:57:51,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:57:51,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:57:51,382 INFO L87 Difference]: Start difference. First operand 2069 states. Second operand 6 states. [2020-10-14 08:57:53,837 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 754 [2020-10-14 08:58:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:58:11,063 INFO L93 Difference]: Finished difference Result 3586 states and 6301 transitions. [2020-10-14 08:58:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:58:11,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2020-10-14 08:58:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:58:11,107 INFO L225 Difference]: With dead ends: 3586 [2020-10-14 08:58:11,107 INFO L226 Difference]: Without dead ends: 2119 [2020-10-14 08:58:11,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:58:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2020-10-14 08:58:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 2017. [2020-10-14 08:58:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2017 states. [2020-10-14 08:58:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2691 transitions. [2020-10-14 08:58:11,288 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2691 transitions. Word has length 104 [2020-10-14 08:58:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:58:11,289 INFO L479 AbstractCegarLoop]: Abstraction has 2017 states and 2691 transitions. [2020-10-14 08:58:11,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:58:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2691 transitions. [2020-10-14 08:58:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 08:58:11,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:58:11,297 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] [2020-10-14 08:58:11,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:58:11,298 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:58:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:58:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -695949717, now seen corresponding path program 1 times [2020-10-14 08:58:11,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:58:11,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462260036] [2020-10-14 08:58:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:58:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:11,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:11,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:11,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:12,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:12,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:14,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:14,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:14,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:16,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:16,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 08:58:16,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:58:16,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:58:16,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:16,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:58:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:58:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 08:58:16,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:58:18,934 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 08:58:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:58:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:18,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:19,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:19,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:58:19,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:58:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-14 08:58:19,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:19,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:58:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:58:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:58:19,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:58:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:58:19,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462260036] [2020-10-14 08:58:19,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:58:19,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:58:19,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123051330] [2020-10-14 08:58:19,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:58:19,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:58:19,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:58:19,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:58:19,107 INFO L87 Difference]: Start difference. First operand 2017 states and 2691 transitions. Second operand 6 states. [2020-10-14 08:58:21,634 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 754 [2020-10-14 08:58:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:58:32,744 INFO L93 Difference]: Finished difference Result 4216 states and 5826 transitions. [2020-10-14 08:58:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:58:32,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-14 08:58:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:58:32,760 INFO L225 Difference]: With dead ends: 4216 [2020-10-14 08:58:32,760 INFO L226 Difference]: Without dead ends: 2557 [2020-10-14 08:58:32,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:58:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2020-10-14 08:58:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2455. [2020-10-14 08:58:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2455 states. [2020-10-14 08:58:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3439 transitions. [2020-10-14 08:58:32,882 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3439 transitions. Word has length 105 [2020-10-14 08:58:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:58:32,885 INFO L479 AbstractCegarLoop]: Abstraction has 2455 states and 3439 transitions. [2020-10-14 08:58:32,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:58:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3439 transitions. [2020-10-14 08:58:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 08:58:32,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:58:32,893 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] [2020-10-14 08:58:32,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:58:32,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:58:32,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:58:32,894 INFO L82 PathProgramCache]: Analyzing trace with hash -502493875, now seen corresponding path program 1 times [2020-10-14 08:58:32,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:58:32,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411376566] [2020-10-14 08:58:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:58:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:33,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:33,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:33,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:33,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:33,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:34,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:38,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:38,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 08:58:38,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:58:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 08:58:38,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:38,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:38,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:58:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:58:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 08:58:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:58:40,454 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 08:58:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:58:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:40,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:40,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:40,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:58:40,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:58:40,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 08:58:40,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:40,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:40,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:58:40,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:58:40,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:58:40,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:58:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:58:40,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411376566] [2020-10-14 08:58:40,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:58:40,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:58:40,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946718877] [2020-10-14 08:58:40,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:58:40,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:58:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:58:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:58:40,596 INFO L87 Difference]: Start difference. First operand 2455 states and 3439 transitions. Second operand 6 states. [2020-10-14 08:58:43,000 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 751 [2020-10-14 08:58:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:58:52,348 INFO L93 Difference]: Finished difference Result 4552 states and 6489 transitions. [2020-10-14 08:58:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:58:52,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2020-10-14 08:58:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:58:52,360 INFO L225 Difference]: With dead ends: 4552 [2020-10-14 08:58:52,360 INFO L226 Difference]: Without dead ends: 2375 [2020-10-14 08:58:52,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:58:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2020-10-14 08:58:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2375. [2020-10-14 08:58:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2375 states. [2020-10-14 08:58:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 3339 transitions. [2020-10-14 08:58:52,455 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 3339 transitions. Word has length 106 [2020-10-14 08:58:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:58:52,456 INFO L479 AbstractCegarLoop]: Abstraction has 2375 states and 3339 transitions. [2020-10-14 08:58:52,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:58:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 3339 transitions. [2020-10-14 08:58:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 08:58:52,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:58:52,461 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] [2020-10-14 08:58:52,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:58:52,462 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:58:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:58:52,462 INFO L82 PathProgramCache]: Analyzing trace with hash -925583225, now seen corresponding path program 1 times [2020-10-14 08:58:52,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:58:52,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938659705] [2020-10-14 08:58:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:58:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:52,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:52,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:52,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:53,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:54,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:54,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:54,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:57,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:57,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:57,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 08:58:57,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:58:57,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-14 08:58:57,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:57,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:57,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 08:58:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:58:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 08:58:57,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:58:59,806 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 08:58:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:58:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:59,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:59,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:59,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:58:59,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:58:59,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 08:58:59,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:59,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:58:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:58:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:58:59,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:58:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:58:59,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938659705] [2020-10-14 08:58:59,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:58:59,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 08:58:59,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979480259] [2020-10-14 08:58:59,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 08:58:59,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:58:59,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 08:58:59,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:58:59,900 INFO L87 Difference]: Start difference. First operand 2375 states and 3339 transitions. Second operand 7 states. [2020-10-14 08:59:02,118 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 755 [2020-10-14 08:59:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:59:12,799 INFO L93 Difference]: Finished difference Result 4340 states and 6050 transitions. [2020-10-14 08:59:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 08:59:12,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-14 08:59:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:59:12,817 INFO L225 Difference]: With dead ends: 4340 [2020-10-14 08:59:12,818 INFO L226 Difference]: Without dead ends: 3093 [2020-10-14 08:59:12,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:59:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2020-10-14 08:59:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2375. [2020-10-14 08:59:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2375 states. [2020-10-14 08:59:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 3338 transitions. [2020-10-14 08:59:12,937 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 3338 transitions. Word has length 107 [2020-10-14 08:59:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:59:12,938 INFO L479 AbstractCegarLoop]: Abstraction has 2375 states and 3338 transitions. [2020-10-14 08:59:12,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 08:59:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 3338 transitions. [2020-10-14 08:59:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 08:59:12,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:59:12,944 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] [2020-10-14 08:59:12,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:59:12,945 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:59:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:59:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 740152337, now seen corresponding path program 1 times [2020-10-14 08:59:12,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:59:12,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331016825] [2020-10-14 08:59:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:59:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:59:13,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:13,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:13,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:13,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:14,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:14,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:15,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:15,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:18,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:59:18,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 08:59:18,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:59:18,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 08:59:18,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:59:18,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:59:18,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 08:59:18,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 08:59:18,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 08:59:18,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:59:20,360 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 08:59:20,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:59:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:59:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:20,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:59:20,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:59:20,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:59:20,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-14 08:59:20,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:59:20,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:59:20,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:59:20,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:59:20,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:59:20,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:59:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:59:20,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331016825] [2020-10-14 08:59:20,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:59:20,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 08:59:20,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737121103] [2020-10-14 08:59:20,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 08:59:20,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:59:20,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 08:59:20,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:59:20,464 INFO L87 Difference]: Start difference. First operand 2375 states and 3338 transitions. Second operand 7 states. [2020-10-14 08:59:22,655 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 749 [2020-10-14 08:59:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:59:40,060 INFO L93 Difference]: Finished difference Result 8849 states and 12908 transitions. [2020-10-14 08:59:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 08:59:40,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-14 08:59:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:59:40,090 INFO L225 Difference]: With dead ends: 8849 [2020-10-14 08:59:40,090 INFO L226 Difference]: Without dead ends: 6720 [2020-10-14 08:59:40,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-14 08:59:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2020-10-14 08:59:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 4944. [2020-10-14 08:59:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4944 states. [2020-10-14 08:59:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 7169 transitions. [2020-10-14 08:59:40,374 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 7169 transitions. Word has length 107 [2020-10-14 08:59:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:59:40,374 INFO L479 AbstractCegarLoop]: Abstraction has 4944 states and 7169 transitions. [2020-10-14 08:59:40,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 08:59:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 7169 transitions. [2020-10-14 08:59:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 08:59:40,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:59:40,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:59:40,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:59:40,383 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:59:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:59:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1890619091, now seen corresponding path program 1 times [2020-10-14 08:59:40,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:59:40,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307250775] [2020-10-14 08:59:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:59:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:59:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:40,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:40,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:41,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:44,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:45,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:45,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:45,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:45,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:59:45,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 08:59:45,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:59:45,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 08:59:45,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:59:45,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:59:45,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:59:45,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:59:45,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 08:59:45,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:59:47,591 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 08:59:47,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:59:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:59:47,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:47,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:59:47,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:59:47,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:59:47,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-14 08:59:47,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:59:47,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:59:47,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:59:47,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:59:47,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:59:47,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:59:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:59:47,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307250775] [2020-10-14 08:59:47,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:59:47,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:59:47,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408738032] [2020-10-14 08:59:47,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:59:47,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:59:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:59:47,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:59:47,708 INFO L87 Difference]: Start difference. First operand 4944 states and 7169 transitions. Second operand 6 states. [2020-10-14 08:59:49,871 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 753 [2020-10-14 08:59:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:59:59,236 INFO L93 Difference]: Finished difference Result 6418 states and 9187 transitions. [2020-10-14 08:59:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:59:59,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-14 08:59:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:59:59,247 INFO L225 Difference]: With dead ends: 6418 [2020-10-14 08:59:59,247 INFO L226 Difference]: Without dead ends: 3335 [2020-10-14 08:59:59,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:59:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-10-14 08:59:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3233. [2020-10-14 08:59:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2020-10-14 08:59:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4593 transitions. [2020-10-14 08:59:59,416 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4593 transitions. Word has length 108 [2020-10-14 08:59:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:59:59,416 INFO L479 AbstractCegarLoop]: Abstraction has 3233 states and 4593 transitions. [2020-10-14 08:59:59,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:59:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4593 transitions. [2020-10-14 08:59:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 08:59:59,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:59:59,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:59:59,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:59:59,422 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:59:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:59:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1902443655, now seen corresponding path program 1 times [2020-10-14 08:59:59,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:59:59,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494764693] [2020-10-14 08:59:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:59:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:59:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:59,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:59,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:59:59,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:01,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:04,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:00:04,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 09:00:04,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:00:04,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 09:00:04,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:00:04,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:00:04,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:00:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:00:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 09:00:04,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:00:06,613 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 09:00:06,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:00:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:00:06,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:06,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:00:06,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:00:06,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:00:06,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 09:00:06,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:00:06,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:00:06,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:00:06,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:00:06,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:00:06,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:00:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:00:06,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494764693] [2020-10-14 09:00:06,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:00:06,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:00:06,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440134239] [2020-10-14 09:00:06,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:00:06,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:00:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:00:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:00:06,738 INFO L87 Difference]: Start difference. First operand 3233 states and 4593 transitions. Second operand 6 states. [2020-10-14 09:00:08,858 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 746 [2020-10-14 09:00:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:00:19,684 INFO L93 Difference]: Finished difference Result 10112 states and 14963 transitions. [2020-10-14 09:00:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:00:19,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-14 09:00:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:00:19,720 INFO L225 Difference]: With dead ends: 10112 [2020-10-14 09:00:19,720 INFO L226 Difference]: Without dead ends: 8309 [2020-10-14 09:00:19,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:00:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8309 states. [2020-10-14 09:00:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8309 to 6273. [2020-10-14 09:00:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6273 states. [2020-10-14 09:00:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9201 transitions. [2020-10-14 09:00:20,077 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9201 transitions. Word has length 108 [2020-10-14 09:00:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:00:20,077 INFO L479 AbstractCegarLoop]: Abstraction has 6273 states and 9201 transitions. [2020-10-14 09:00:20,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:00:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9201 transitions. [2020-10-14 09:00:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 09:00:20,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:00:20,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:00:20,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:00:20,085 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:00:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:00:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1537134247, now seen corresponding path program 1 times [2020-10-14 09:00:20,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:00:20,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939518293] [2020-10-14 09:00:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:00:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:00:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:20,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:20,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:21,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:21,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:23,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:23,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:23,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:23,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:24,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:25,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:00:25,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-14 09:00:25,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:00:25,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 09:00:25,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:00:25,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:00:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:00:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:00:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 09:00:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:00:27,331 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 09:00:27,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:00:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:00:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:27,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:00:27,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:00:27,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:00:27,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-14 09:00:27,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:00:27,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:00:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:00:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:00:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:00:27,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:00:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:00:27,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939518293] [2020-10-14 09:00:27,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:00:27,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:00:27,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910330673] [2020-10-14 09:00:27,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:00:27,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:00:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:00:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:00:27,439 INFO L87 Difference]: Start difference. First operand 6273 states and 9201 transitions. Second operand 6 states. [2020-10-14 09:00:29,610 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 754 [2020-10-14 09:00:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:00:38,912 INFO L93 Difference]: Finished difference Result 16592 states and 24542 transitions. [2020-10-14 09:00:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:00:38,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-10-14 09:00:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:00:38,933 INFO L225 Difference]: With dead ends: 16592 [2020-10-14 09:00:38,933 INFO L226 Difference]: Without dead ends: 10465 [2020-10-14 09:00:38,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:00:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10465 states. [2020-10-14 09:00:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10465 to 10363. [2020-10-14 09:00:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10363 states. [2020-10-14 09:00:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 15375 transitions. [2020-10-14 09:00:39,527 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 15375 transitions. Word has length 109 [2020-10-14 09:00:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:00:39,527 INFO L479 AbstractCegarLoop]: Abstraction has 10363 states and 15375 transitions. [2020-10-14 09:00:39,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:00:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 15375 transitions. [2020-10-14 09:00:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 09:00:39,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:00:39,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:00:39,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:00:39,535 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:00:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:00:39,535 INFO L82 PathProgramCache]: Analyzing trace with hash -958838931, now seen corresponding path program 1 times [2020-10-14 09:00:39,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:00:39,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280611795] [2020-10-14 09:00:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:00:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:00:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:39,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:41,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:41,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:42,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:42,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:43,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:44,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:00:44,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 09:00:44,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:00:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 09:00:44,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:00:44,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:00:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:00:44,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:00:44,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 09:00:44,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:00:46,764 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 09:00:46,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:00:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:00:46,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:46,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:00:46,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:00:46,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:00:46,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 09:00:46,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:00:46,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:00:46,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:00:46,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:00:46,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:00:46,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:00:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:00:46,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280611795] [2020-10-14 09:00:46,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:00:46,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:00:46,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49043887] [2020-10-14 09:00:46,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:00:46,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:00:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:00:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:00:46,885 INFO L87 Difference]: Start difference. First operand 10363 states and 15375 transitions. Second operand 6 states. [2020-10-14 09:00:49,033 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 751 [2020-10-14 09:00:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:00:57,809 INFO L93 Difference]: Finished difference Result 20580 states and 30601 transitions. [2020-10-14 09:00:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:00:57,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2020-10-14 09:00:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:00:57,834 INFO L225 Difference]: With dead ends: 20580 [2020-10-14 09:00:57,835 INFO L226 Difference]: Without dead ends: 10323 [2020-10-14 09:00:57,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:00:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10323 states. [2020-10-14 09:00:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10323 to 10323. [2020-10-14 09:00:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10323 states. [2020-10-14 09:00:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 15269 transitions. [2020-10-14 09:00:58,396 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 15269 transitions. Word has length 110 [2020-10-14 09:00:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:00:58,397 INFO L479 AbstractCegarLoop]: Abstraction has 10323 states and 15269 transitions. [2020-10-14 09:00:58,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:00:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 15269 transitions. [2020-10-14 09:00:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 09:00:58,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:00:58,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:00:58,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:00:58,406 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr28ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr26ASSERT_VIOLATIONERROR_FUNCTION, mainErr18ASSERT_VIOLATIONERROR_FUNCTION, mainErr24ASSERT_VIOLATIONERROR_FUNCTION, mainErr20ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr22ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr19ASSERT_VIOLATIONERROR_FUNCTION, mainErr25ASSERT_VIOLATIONERROR_FUNCTION, mainErr17ASSERT_VIOLATIONERROR_FUNCTION, mainErr27ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr21ASSERT_VIOLATIONERROR_FUNCTION, mainErr23ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:00:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:00:58,406 INFO L82 PathProgramCache]: Analyzing trace with hash 245612201, now seen corresponding path program 1 times [2020-10-14 09:00:58,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:00:58,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100718630] [2020-10-14 09:00:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:00:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:00:58,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:58,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:59,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:00:59,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:01:00,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:01:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:01:02,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:01:03,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:01:03,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 09:01:03,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:01:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 09:01:03,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:01:03,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:01:03,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 09:01:03,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:01:03,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-14 09:01:03,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:01:05,733 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 745 [2020-10-14 09:01:05,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:01:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:01:05,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:01:05,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:01:05,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:01:05,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:01:05,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-14 09:01:05,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:01:05,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:01:05,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:01:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:01:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:01:05,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:01:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:01:05,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100718630] [2020-10-14 09:01:05,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:01:05,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 09:01:05,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424042939] [2020-10-14 09:01:05,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 09:01:05,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:01:05,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 09:01:05,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:01:05,847 INFO L87 Difference]: Start difference. First operand 10323 states and 15269 transitions. Second operand 10 states. [2020-10-14 09:01:08,135 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 756