/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:25:16,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:25:16,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:25:16,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:25:16,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:25:16,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:25:16,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:25:16,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:25:16,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:25:16,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:25:16,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:25:16,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:25:16,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:25:16,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:25:16,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:25:16,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:25:16,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:25:16,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:25:16,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:25:16,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:25:16,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:25:16,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:25:16,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:25:16,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:25:16,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:25:16,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:25:16,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:25:16,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:25:16,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:25:16,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:25:16,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:25:16,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:25:16,722 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:25:16,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:25:16,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:25:16,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:25:16,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:25:16,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:25:16,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:25:16,724 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:25:16,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:25:16,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:25:16,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:25:16,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:25:16,725 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:25:16,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:25:16,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:25:16,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:16,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:25:16,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:25:16,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:25:16,727 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:25:17,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:25:17,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:25:17,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:25:17,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:25:17,196 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:25:17,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-11-07 00:25:17,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9bf2ce9d/f6502bb7277247dc8784adf332d1ce53/FLAGf8a631d06 [2020-11-07 00:25:17,822 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:25:17,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-11-07 00:25:17,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9bf2ce9d/f6502bb7277247dc8784adf332d1ce53/FLAGf8a631d06 [2020-11-07 00:25:18,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9bf2ce9d/f6502bb7277247dc8784adf332d1ce53 [2020-11-07 00:25:18,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:25:18,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:25:18,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:18,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:25:18,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:25:18,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799ed53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18, skipping insertion in model container [2020-11-07 00:25:18,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:25:18,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:25:18,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:18,427 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:25:18,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:18,494 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:25:18,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18 WrapperNode [2020-11-07 00:25:18,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:18,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:25:18,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:25:18,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:25:18,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:25:18,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:25:18,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:25:18,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:25:18,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-07 00:25:18,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:25:18,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:25:18,640 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:25:18,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 00:25:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-11-07 00:25:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-11-07 00:25:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-11-07 00:25:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:25:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:25:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:25:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:25:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:25:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 00:25:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 00:25:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 00:25:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-11-07 00:25:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-11-07 00:25:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-11-07 00:25:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:25:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:25:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:25:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:25:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:25:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:25:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:25:19,539 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:25:19,540 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 00:25:19,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:19 BoogieIcfgContainer [2020-11-07 00:25:19,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:25:19,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:25:19,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:25:19,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:25:19,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:25:18" (1/3) ... [2020-11-07 00:25:19,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcad483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:19, skipping insertion in model container [2020-11-07 00:25:19,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (2/3) ... [2020-11-07 00:25:19,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcad483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:19, skipping insertion in model container [2020-11-07 00:25:19,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:19" (3/3) ... [2020-11-07 00:25:19,552 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-11-07 00:25:19,569 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:25:19,575 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:25:19,589 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:25:19,618 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:25:19,618 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:25:19,618 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:25:19,619 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:25:19,619 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:25:19,619 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:25:19,619 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:25:19,619 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:25:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-11-07 00:25:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 00:25:19,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:19,660 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:19,660 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash -415784909, now seen corresponding path program 1 times [2020-11-07 00:25:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:19,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484217943] [2020-11-07 00:25:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:19,758 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-07 00:25:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-07 00:25:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-11-07 00:25:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-11-07 00:25:20,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484217943] [2020-11-07 00:25:20,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:20,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:25:20,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348855327] [2020-11-07 00:25:20,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:25:20,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:20,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:25:20,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:25:20,220 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2020-11-07 00:25:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:21,088 INFO L93 Difference]: Finished difference Result 266 states and 323 transitions. [2020-11-07 00:25:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:25:21,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-11-07 00:25:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:21,116 INFO L225 Difference]: With dead ends: 266 [2020-11-07 00:25:21,116 INFO L226 Difference]: Without dead ends: 135 [2020-11-07 00:25:21,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-07 00:25:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-11-07 00:25:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-07 00:25:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2020-11-07 00:25:21,238 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 109 [2020-11-07 00:25:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:21,241 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2020-11-07 00:25:21,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:25:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2020-11-07 00:25:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-07 00:25:21,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:21,252 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:21,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:25:21,253 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2075471796, now seen corresponding path program 1 times [2020-11-07 00:25:21,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:21,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661537983] [2020-11-07 00:25:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:21,264 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-07 00:25:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-07 00:25:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-11-07 00:25:21,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661537983] [2020-11-07 00:25:21,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:21,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:25:21,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430623510] [2020-11-07 00:25:21,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:25:21,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:21,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:25:21,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:21,510 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 5 states. [2020-11-07 00:25:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:22,264 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-11-07 00:25:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:25:22,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-11-07 00:25:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:22,267 INFO L225 Difference]: With dead ends: 152 [2020-11-07 00:25:22,268 INFO L226 Difference]: Without dead ends: 134 [2020-11-07 00:25:22,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-07 00:25:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-11-07 00:25:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-07 00:25:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2020-11-07 00:25:22,298 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 111 [2020-11-07 00:25:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:22,299 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2020-11-07 00:25:22,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:25:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2020-11-07 00:25:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-07 00:25:22,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:22,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:22,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:25:22,302 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash 37781676, now seen corresponding path program 1 times [2020-11-07 00:25:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:22,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894319401] [2020-11-07 00:25:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:22,306 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-07 00:25:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-07 00:25:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-07 00:25:22,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894319401] [2020-11-07 00:25:22,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:22,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:25:22,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446092086] [2020-11-07 00:25:22,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:25:22,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:22,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:25:22,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:22,477 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand 5 states. [2020-11-07 00:25:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:23,108 INFO L93 Difference]: Finished difference Result 273 states and 320 transitions. [2020-11-07 00:25:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:25:23,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-11-07 00:25:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:23,116 INFO L225 Difference]: With dead ends: 273 [2020-11-07 00:25:23,116 INFO L226 Difference]: Without dead ends: 175 [2020-11-07 00:25:23,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:25:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-07 00:25:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2020-11-07 00:25:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-07 00:25:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2020-11-07 00:25:23,165 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 111 [2020-11-07 00:25:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:23,166 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2020-11-07 00:25:23,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:25:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2020-11-07 00:25:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-11-07 00:25:23,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:23,168 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:23,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:25:23,169 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:23,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1061811624, now seen corresponding path program 1 times [2020-11-07 00:25:23,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:23,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711864298] [2020-11-07 00:25:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:23,173 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-07 00:25:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:25:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-11-07 00:25:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:23,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711864298] [2020-11-07 00:25:23,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:23,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:25:23,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628817276] [2020-11-07 00:25:23,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:25:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:25:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:23,346 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 5 states. [2020-11-07 00:25:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:23,909 INFO L93 Difference]: Finished difference Result 284 states and 333 transitions. [2020-11-07 00:25:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:25:23,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-11-07 00:25:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:23,912 INFO L225 Difference]: With dead ends: 284 [2020-11-07 00:25:23,912 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 00:25:23,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 00:25:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2020-11-07 00:25:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-07 00:25:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2020-11-07 00:25:23,949 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 114 [2020-11-07 00:25:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:23,950 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2020-11-07 00:25:23,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:25:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2020-11-07 00:25:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-11-07 00:25:23,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:23,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:23,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:25:23,953 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash -503903925, now seen corresponding path program 1 times [2020-11-07 00:25:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708297238] [2020-11-07 00:25:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:24,140 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:24,168 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:24,172 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 00:25:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-11-07 00:25:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-11-07 00:25:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:24,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708297238] [2020-11-07 00:25:24,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:24,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:25:24,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318677158] [2020-11-07 00:25:24,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:25:24,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:24,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:25:24,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:25:24,478 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand 6 states. [2020-11-07 00:25:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:25,137 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2020-11-07 00:25:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:25:25,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-11-07 00:25:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:25,144 INFO L225 Difference]: With dead ends: 320 [2020-11-07 00:25:25,144 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 00:25:25,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 00:25:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 180. [2020-11-07 00:25:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 00:25:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 209 transitions. [2020-11-07 00:25:25,192 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 209 transitions. Word has length 119 [2020-11-07 00:25:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:25,192 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 209 transitions. [2020-11-07 00:25:25,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:25:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 209 transitions. [2020-11-07 00:25:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-11-07 00:25:25,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:25,195 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:25,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:25:25,195 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1598599897, now seen corresponding path program 1 times [2020-11-07 00:25:25,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:25,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232976054] [2020-11-07 00:25:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:25,199 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 00:25:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-11-07 00:25:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-11-07 00:25:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:25,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232976054] [2020-11-07 00:25:25,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:25,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:25:25,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793547341] [2020-11-07 00:25:25,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:25:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:25:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:25:25,428 INFO L87 Difference]: Start difference. First operand 180 states and 209 transitions. Second operand 6 states. [2020-11-07 00:25:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:26,101 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2020-11-07 00:25:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:25:26,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-11-07 00:25:26,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:26,105 INFO L225 Difference]: With dead ends: 320 [2020-11-07 00:25:26,105 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 00:25:26,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 00:25:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-11-07 00:25:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-11-07 00:25:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 212 transitions. [2020-11-07 00:25:26,147 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 212 transitions. Word has length 119 [2020-11-07 00:25:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:26,147 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 212 transitions. [2020-11-07 00:25:26,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:25:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 212 transitions. [2020-11-07 00:25:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-07 00:25:26,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:26,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:26,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:25:26,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:26,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1705231240, now seen corresponding path program 2 times [2020-11-07 00:25:26,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:26,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140613440] [2020-11-07 00:25:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:26,295 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:26,433 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:26,435 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:26,438 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-07 00:25:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:25:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-11-07 00:25:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140613440] [2020-11-07 00:25:26,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:26,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:25:26,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843022566] [2020-11-07 00:25:26,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:25:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:25:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:26,584 INFO L87 Difference]: Start difference. First operand 183 states and 212 transitions. Second operand 7 states. [2020-11-07 00:25:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:27,206 INFO L93 Difference]: Finished difference Result 354 states and 418 transitions. [2020-11-07 00:25:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:25:27,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-11-07 00:25:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:27,208 INFO L225 Difference]: With dead ends: 354 [2020-11-07 00:25:27,209 INFO L226 Difference]: Without dead ends: 225 [2020-11-07 00:25:27,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-11-07 00:25:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 193. [2020-11-07 00:25:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-07 00:25:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 225 transitions. [2020-11-07 00:25:27,244 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 225 transitions. Word has length 124 [2020-11-07 00:25:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:27,245 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 225 transitions. [2020-11-07 00:25:27,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:25:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 225 transitions. [2020-11-07 00:25:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-07 00:25:27,247 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:27,247 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:27,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:25:27,248 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:27,248 INFO L82 PathProgramCache]: Analyzing trace with hash -487232234, now seen corresponding path program 1 times [2020-11-07 00:25:27,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:27,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171923933] [2020-11-07 00:25:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:27,404 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:27,407 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:27,409 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-07 00:25:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:25:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-11-07 00:25:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:27,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171923933] [2020-11-07 00:25:27,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:27,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:25:27,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777063126] [2020-11-07 00:25:27,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:25:27,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:27,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:25:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:27,596 INFO L87 Difference]: Start difference. First operand 193 states and 225 transitions. Second operand 7 states. [2020-11-07 00:25:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:28,436 INFO L93 Difference]: Finished difference Result 348 states and 412 transitions. [2020-11-07 00:25:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:25:28,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-11-07 00:25:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:28,440 INFO L225 Difference]: With dead ends: 348 [2020-11-07 00:25:28,440 INFO L226 Difference]: Without dead ends: 221 [2020-11-07 00:25:28,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-07 00:25:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2020-11-07 00:25:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-07 00:25:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 225 transitions. [2020-11-07 00:25:28,481 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 225 transitions. Word has length 124 [2020-11-07 00:25:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:28,482 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 225 transitions. [2020-11-07 00:25:28,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:25:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 225 transitions. [2020-11-07 00:25:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-07 00:25:28,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:28,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:28,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:25:28,485 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash 452126571, now seen corresponding path program 3 times [2020-11-07 00:25:28,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:28,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581573888] [2020-11-07 00:25:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:28,625 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:28,779 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:28,787 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:28,789 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-07 00:25:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-07 00:25:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-11-07 00:25:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:28,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581573888] [2020-11-07 00:25:28,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:28,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:25:28,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703115824] [2020-11-07 00:25:28,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:25:28,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:25:28,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:25:28,995 INFO L87 Difference]: Start difference. First operand 193 states and 225 transitions. Second operand 8 states. [2020-11-07 00:25:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:30,120 INFO L93 Difference]: Finished difference Result 381 states and 451 transitions. [2020-11-07 00:25:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:25:30,121 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2020-11-07 00:25:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:30,124 INFO L225 Difference]: With dead ends: 381 [2020-11-07 00:25:30,124 INFO L226 Difference]: Without dead ends: 247 [2020-11-07 00:25:30,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-11-07 00:25:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 203. [2020-11-07 00:25:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 00:25:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2020-11-07 00:25:30,169 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 129 [2020-11-07 00:25:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:30,171 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2020-11-07 00:25:30,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:25:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2020-11-07 00:25:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-07 00:25:30,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:30,173 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:30,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:25:30,173 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1740336903, now seen corresponding path program 2 times [2020-11-07 00:25:30,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:30,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939792483] [2020-11-07 00:25:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:30,322 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:30,324 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:30,326 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-07 00:25:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-07 00:25:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-11-07 00:25:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:30,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939792483] [2020-11-07 00:25:30,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:30,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:25:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215129469] [2020-11-07 00:25:30,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:25:30,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:25:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:25:30,545 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand 8 states. [2020-11-07 00:25:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:31,456 INFO L93 Difference]: Finished difference Result 367 states and 437 transitions. [2020-11-07 00:25:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:25:31,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2020-11-07 00:25:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:31,458 INFO L225 Difference]: With dead ends: 367 [2020-11-07 00:25:31,459 INFO L226 Difference]: Without dead ends: 235 [2020-11-07 00:25:31,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-11-07 00:25:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 203. [2020-11-07 00:25:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 00:25:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2020-11-07 00:25:31,506 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 129 [2020-11-07 00:25:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:31,507 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2020-11-07 00:25:31,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:25:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2020-11-07 00:25:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-07 00:25:31,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:31,510 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:31,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:25:31,510 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1677870744, now seen corresponding path program 4 times [2020-11-07 00:25:31,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:31,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263064802] [2020-11-07 00:25:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:31,655 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:31,798 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:31,800 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:31,802 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 00:25:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:25:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-11-07 00:25:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:32,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263064802] [2020-11-07 00:25:32,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:32,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:25:32,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462001599] [2020-11-07 00:25:32,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:25:32,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:25:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:25:32,020 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand 9 states. [2020-11-07 00:25:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:33,112 INFO L93 Difference]: Finished difference Result 408 states and 484 transitions. [2020-11-07 00:25:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:25:33,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 134 [2020-11-07 00:25:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:33,115 INFO L225 Difference]: With dead ends: 408 [2020-11-07 00:25:33,115 INFO L226 Difference]: Without dead ends: 269 [2020-11-07 00:25:33,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:25:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-11-07 00:25:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 213. [2020-11-07 00:25:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-11-07 00:25:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2020-11-07 00:25:33,154 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 134 [2020-11-07 00:25:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:33,155 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2020-11-07 00:25:33,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:25:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2020-11-07 00:25:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-07 00:25:33,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:33,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:33,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:25:33,158 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 424633078, now seen corresponding path program 3 times [2020-11-07 00:25:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:33,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565366458] [2020-11-07 00:25:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:33,301 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:33,303 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:33,304 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 00:25:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:25:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-11-07 00:25:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:33,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565366458] [2020-11-07 00:25:33,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:33,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:25:33,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547172724] [2020-11-07 00:25:33,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:25:33,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:25:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:25:33,532 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand 9 states. [2020-11-07 00:25:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:34,671 INFO L93 Difference]: Finished difference Result 386 states and 462 transitions. [2020-11-07 00:25:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:25:34,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 134 [2020-11-07 00:25:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:34,676 INFO L225 Difference]: With dead ends: 386 [2020-11-07 00:25:34,677 INFO L226 Difference]: Without dead ends: 249 [2020-11-07 00:25:34,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:25:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-11-07 00:25:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 213. [2020-11-07 00:25:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-11-07 00:25:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2020-11-07 00:25:34,725 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 134 [2020-11-07 00:25:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:34,725 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2020-11-07 00:25:34,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:25:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2020-11-07 00:25:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 00:25:34,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:34,727 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:34,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:25:34,728 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:34,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2050515573, now seen corresponding path program 5 times [2020-11-07 00:25:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:34,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478476181] [2020-11-07 00:25:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:34,878 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:35,022 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:35,024 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:35,025 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:35,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:35,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:35,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:35,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:35,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-11-07 00:25:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:35,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-07 00:25:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:35,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478476181] [2020-11-07 00:25:35,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:35,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:25:35,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031636400] [2020-11-07 00:25:35,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:25:35,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:25:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:35,214 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand 10 states. [2020-11-07 00:25:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:36,508 INFO L93 Difference]: Finished difference Result 435 states and 517 transitions. [2020-11-07 00:25:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:25:36,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-11-07 00:25:36,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:36,513 INFO L225 Difference]: With dead ends: 435 [2020-11-07 00:25:36,513 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 00:25:36,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:25:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 00:25:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 223. [2020-11-07 00:25:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 00:25:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2020-11-07 00:25:36,561 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 139 [2020-11-07 00:25:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:36,562 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2020-11-07 00:25:36,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:25:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2020-11-07 00:25:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 00:25:36,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:36,564 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:36,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:25:36,565 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash 51988249, now seen corresponding path program 4 times [2020-11-07 00:25:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:36,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417651291] [2020-11-07 00:25:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:36,718 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:36,721 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:36,722 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-11-07 00:25:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-07 00:25:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:36,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417651291] [2020-11-07 00:25:36,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:36,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:25:36,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23156858] [2020-11-07 00:25:36,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:25:36,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:36,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:25:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:36,979 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand 10 states. [2020-11-07 00:25:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:38,364 INFO L93 Difference]: Finished difference Result 405 states and 487 transitions. [2020-11-07 00:25:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:25:38,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-11-07 00:25:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:38,368 INFO L225 Difference]: With dead ends: 405 [2020-11-07 00:25:38,368 INFO L226 Difference]: Without dead ends: 263 [2020-11-07 00:25:38,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:25:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-07 00:25:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 223. [2020-11-07 00:25:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 00:25:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2020-11-07 00:25:38,411 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 139 [2020-11-07 00:25:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:38,411 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2020-11-07 00:25:38,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:25:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2020-11-07 00:25:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-07 00:25:38,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:38,413 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:38,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:25:38,414 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1639590072, now seen corresponding path program 6 times [2020-11-07 00:25:38,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:38,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717736223] [2020-11-07 00:25:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:38,574 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:38,730 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:38,733 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:38,734 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-11-07 00:25:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:25:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-11-07 00:25:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:38,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717736223] [2020-11-07 00:25:38,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:38,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:25:38,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244505049] [2020-11-07 00:25:38,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:25:38,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:38,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:25:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:25:38,967 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand 11 states. [2020-11-07 00:25:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:40,221 INFO L93 Difference]: Finished difference Result 462 states and 550 transitions. [2020-11-07 00:25:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:25:40,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-11-07 00:25:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:40,224 INFO L225 Difference]: With dead ends: 462 [2020-11-07 00:25:40,224 INFO L226 Difference]: Without dead ends: 313 [2020-11-07 00:25:40,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:25:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-11-07 00:25:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 233. [2020-11-07 00:25:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-07 00:25:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 277 transitions. [2020-11-07 00:25:40,274 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 277 transitions. Word has length 144 [2020-11-07 00:25:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:40,274 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 277 transitions. [2020-11-07 00:25:40,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:25:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 277 transitions. [2020-11-07 00:25:40,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-07 00:25:40,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:40,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:40,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:25:40,276 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:40,277 INFO L82 PathProgramCache]: Analyzing trace with hash 462913750, now seen corresponding path program 5 times [2020-11-07 00:25:40,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:40,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091113849] [2020-11-07 00:25:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:40,435 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:40,437 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:40,439 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-11-07 00:25:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:25:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-11-07 00:25:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:40,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091113849] [2020-11-07 00:25:40,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:40,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:25:40,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857648041] [2020-11-07 00:25:40,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:25:40,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:25:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:25:40,750 INFO L87 Difference]: Start difference. First operand 233 states and 277 transitions. Second operand 11 states. [2020-11-07 00:25:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:42,419 INFO L93 Difference]: Finished difference Result 424 states and 512 transitions. [2020-11-07 00:25:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:25:42,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-11-07 00:25:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:42,423 INFO L225 Difference]: With dead ends: 424 [2020-11-07 00:25:42,423 INFO L226 Difference]: Without dead ends: 277 [2020-11-07 00:25:42,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:25:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-11-07 00:25:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2020-11-07 00:25:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-07 00:25:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 277 transitions. [2020-11-07 00:25:42,467 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 277 transitions. Word has length 144 [2020-11-07 00:25:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:42,468 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 277 transitions. [2020-11-07 00:25:42,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:25:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 277 transitions. [2020-11-07 00:25:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-11-07 00:25:42,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:42,470 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:42,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:25:42,471 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:42,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1421399125, now seen corresponding path program 7 times [2020-11-07 00:25:42,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:42,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183292968] [2020-11-07 00:25:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:42,632 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:42,786 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:42,788 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:42,790 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-11-07 00:25:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:43,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-11-07 00:25:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:43,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-11-07 00:25:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:43,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183292968] [2020-11-07 00:25:43,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:43,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:25:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389024720] [2020-11-07 00:25:43,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:25:43,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:25:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:43,030 INFO L87 Difference]: Start difference. First operand 233 states and 277 transitions. Second operand 12 states. [2020-11-07 00:25:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:44,427 INFO L93 Difference]: Finished difference Result 489 states and 583 transitions. [2020-11-07 00:25:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:25:44,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2020-11-07 00:25:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:44,432 INFO L225 Difference]: With dead ends: 489 [2020-11-07 00:25:44,432 INFO L226 Difference]: Without dead ends: 335 [2020-11-07 00:25:44,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:25:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-11-07 00:25:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 243. [2020-11-07 00:25:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-11-07 00:25:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 290 transitions. [2020-11-07 00:25:44,487 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 290 transitions. Word has length 149 [2020-11-07 00:25:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:44,487 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 290 transitions. [2020-11-07 00:25:44,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:25:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 290 transitions. [2020-11-07 00:25:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-11-07 00:25:44,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:44,490 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:44,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:25:44,491 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:44,491 INFO L82 PathProgramCache]: Analyzing trace with hash 681104697, now seen corresponding path program 6 times [2020-11-07 00:25:44,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:44,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129062415] [2020-11-07 00:25:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:44,652 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:44,654 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:44,656 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-11-07 00:25:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-11-07 00:25:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-11-07 00:25:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:44,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129062415] [2020-11-07 00:25:44,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:44,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:25:44,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307097969] [2020-11-07 00:25:44,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:25:44,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:44,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:25:44,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:44,985 INFO L87 Difference]: Start difference. First operand 243 states and 290 transitions. Second operand 12 states. [2020-11-07 00:25:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:46,929 INFO L93 Difference]: Finished difference Result 443 states and 537 transitions. [2020-11-07 00:25:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:25:46,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2020-11-07 00:25:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:46,940 INFO L225 Difference]: With dead ends: 443 [2020-11-07 00:25:46,940 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 00:25:46,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:25:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 00:25:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 243. [2020-11-07 00:25:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-11-07 00:25:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 290 transitions. [2020-11-07 00:25:47,002 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 290 transitions. Word has length 149 [2020-11-07 00:25:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:47,002 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 290 transitions. [2020-11-07 00:25:47,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:25:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 290 transitions. [2020-11-07 00:25:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-07 00:25:47,004 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:47,004 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:47,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:25:47,004 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:47,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1763042008, now seen corresponding path program 8 times [2020-11-07 00:25:47,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:47,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038965436] [2020-11-07 00:25:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:47,152 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:47,322 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:47,327 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:47,328 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:47,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:47,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:47,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:47,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-11-07 00:25:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:47,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-11-07 00:25:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:47,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-11-07 00:25:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:47,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038965436] [2020-11-07 00:25:47,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:47,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 00:25:47,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862581810] [2020-11-07 00:25:47,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 00:25:47,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 00:25:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:25:47,608 INFO L87 Difference]: Start difference. First operand 243 states and 290 transitions. Second operand 13 states. [2020-11-07 00:25:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:49,381 INFO L93 Difference]: Finished difference Result 516 states and 616 transitions. [2020-11-07 00:25:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 00:25:49,382 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 154 [2020-11-07 00:25:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:49,384 INFO L225 Difference]: With dead ends: 516 [2020-11-07 00:25:49,384 INFO L226 Difference]: Without dead ends: 357 [2020-11-07 00:25:49,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:25:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-11-07 00:25:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 253. [2020-11-07 00:25:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 00:25:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2020-11-07 00:25:49,441 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 154 [2020-11-07 00:25:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:49,442 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2020-11-07 00:25:49,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 00:25:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2020-11-07 00:25:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-07 00:25:49,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:49,443 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:49,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 00:25:49,444 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash 339461814, now seen corresponding path program 7 times [2020-11-07 00:25:49,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:49,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354350096] [2020-11-07 00:25:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:49,601 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:49,603 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:49,605 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-11-07 00:25:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-11-07 00:25:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-11-07 00:25:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:49,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354350096] [2020-11-07 00:25:49,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:49,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 00:25:49,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906137672] [2020-11-07 00:25:49,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 00:25:49,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:49,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 00:25:49,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:25:49,955 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand 13 states. [2020-11-07 00:25:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:51,733 INFO L93 Difference]: Finished difference Result 462 states and 562 transitions. [2020-11-07 00:25:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 00:25:51,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 154 [2020-11-07 00:25:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:51,736 INFO L225 Difference]: With dead ends: 462 [2020-11-07 00:25:51,736 INFO L226 Difference]: Without dead ends: 305 [2020-11-07 00:25:51,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:25:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-11-07 00:25:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 253. [2020-11-07 00:25:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 00:25:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2020-11-07 00:25:51,794 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 154 [2020-11-07 00:25:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:51,794 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2020-11-07 00:25:51,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 00:25:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2020-11-07 00:25:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 00:25:51,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:51,796 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:51,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 00:25:51,796 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1245474357, now seen corresponding path program 9 times [2020-11-07 00:25:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:51,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043785054] [2020-11-07 00:25:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:51,957 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:52,118 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:52,120 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:52,121 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:52,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:52,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:52,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:52,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-11-07 00:25:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:52,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-11-07 00:25:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:52,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-11-07 00:25:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:52,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043785054] [2020-11-07 00:25:52,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:52,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:25:52,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245898782] [2020-11-07 00:25:52,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:25:52,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:25:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:52,435 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand 14 states. [2020-11-07 00:25:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:54,178 INFO L93 Difference]: Finished difference Result 543 states and 649 transitions. [2020-11-07 00:25:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:25:54,179 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2020-11-07 00:25:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:54,182 INFO L225 Difference]: With dead ends: 543 [2020-11-07 00:25:54,182 INFO L226 Difference]: Without dead ends: 379 [2020-11-07 00:25:54,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:25:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-11-07 00:25:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 263. [2020-11-07 00:25:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-07 00:25:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 316 transitions. [2020-11-07 00:25:54,245 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 316 transitions. Word has length 159 [2020-11-07 00:25:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:54,245 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 316 transitions. [2020-11-07 00:25:54,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:25:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 316 transitions. [2020-11-07 00:25:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 00:25:54,247 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:54,247 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:54,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 00:25:54,247 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash 857029465, now seen corresponding path program 8 times [2020-11-07 00:25:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:54,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438110042] [2020-11-07 00:25:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:54,410 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:54,413 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:54,414 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:54,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:54,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:54,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:54,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-11-07 00:25:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:54,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-11-07 00:25:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-11-07 00:25:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:54,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438110042] [2020-11-07 00:25:54,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:54,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:25:54,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346186726] [2020-11-07 00:25:54,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:25:54,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:25:54,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:54,787 INFO L87 Difference]: Start difference. First operand 263 states and 316 transitions. Second operand 14 states. [2020-11-07 00:25:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:56,732 INFO L93 Difference]: Finished difference Result 481 states and 587 transitions. [2020-11-07 00:25:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:25:56,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2020-11-07 00:25:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:56,740 INFO L225 Difference]: With dead ends: 481 [2020-11-07 00:25:56,740 INFO L226 Difference]: Without dead ends: 319 [2020-11-07 00:25:56,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:25:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-11-07 00:25:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 263. [2020-11-07 00:25:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-07 00:25:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 316 transitions. [2020-11-07 00:25:56,812 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 316 transitions. Word has length 159 [2020-11-07 00:25:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:56,812 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 316 transitions. [2020-11-07 00:25:56,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:25:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 316 transitions. [2020-11-07 00:25:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-11-07 00:25:56,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:56,814 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:56,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 00:25:56,815 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash -19363064, now seen corresponding path program 10 times [2020-11-07 00:25:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:56,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160539694] [2020-11-07 00:25:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:56,988 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:57,151 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:57,152 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:57,154 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:57,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:57,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:57,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:57,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-11-07 00:25:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:57,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-11-07 00:25:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:57,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-11-07 00:25:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:57,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160539694] [2020-11-07 00:25:57,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:57,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:25:57,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102220249] [2020-11-07 00:25:57,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:25:57,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:25:57,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:25:57,462 INFO L87 Difference]: Start difference. First operand 263 states and 316 transitions. Second operand 15 states. [2020-11-07 00:25:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:59,654 INFO L93 Difference]: Finished difference Result 570 states and 682 transitions. [2020-11-07 00:25:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:25:59,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 164 [2020-11-07 00:25:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:59,666 INFO L225 Difference]: With dead ends: 570 [2020-11-07 00:25:59,666 INFO L226 Difference]: Without dead ends: 401 [2020-11-07 00:25:59,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:25:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-11-07 00:25:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 273. [2020-11-07 00:25:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 00:25:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 329 transitions. [2020-11-07 00:25:59,732 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 329 transitions. Word has length 164 [2020-11-07 00:25:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:59,733 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 329 transitions. [2020-11-07 00:25:59,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:25:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 329 transitions. [2020-11-07 00:25:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-11-07 00:25:59,735 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:59,735 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:59,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 00:25:59,735 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2083140758, now seen corresponding path program 9 times [2020-11-07 00:25:59,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:59,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077298566] [2020-11-07 00:25:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:59,896 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:59,898 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:59,901 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:00,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-11-07 00:26:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:00,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-11-07 00:26:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:00,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-11-07 00:26:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:00,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077298566] [2020-11-07 00:26:00,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:00,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:26:00,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007526712] [2020-11-07 00:26:00,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:26:00,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:26:00,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:26:00,383 INFO L87 Difference]: Start difference. First operand 273 states and 329 transitions. Second operand 15 states. [2020-11-07 00:26:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:03,204 INFO L93 Difference]: Finished difference Result 500 states and 612 transitions. [2020-11-07 00:26:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:26:03,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 164 [2020-11-07 00:26:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:03,208 INFO L225 Difference]: With dead ends: 500 [2020-11-07 00:26:03,208 INFO L226 Difference]: Without dead ends: 333 [2020-11-07 00:26:03,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:26:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-11-07 00:26:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 273. [2020-11-07 00:26:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 00:26:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 329 transitions. [2020-11-07 00:26:03,274 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 329 transitions. Word has length 164 [2020-11-07 00:26:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:03,275 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 329 transitions. [2020-11-07 00:26:03,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:26:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 329 transitions. [2020-11-07 00:26:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 00:26:03,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:03,277 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:03,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 00:26:03,277 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1861300245, now seen corresponding path program 11 times [2020-11-07 00:26:03,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:03,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991762561] [2020-11-07 00:26:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:03,440 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:03,602 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:03,604 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:03,606 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-11-07 00:26:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-11-07 00:26:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-11-07 00:26:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:03,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991762561] [2020-11-07 00:26:03,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:03,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:26:03,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740854430] [2020-11-07 00:26:03,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:26:03,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:03,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:26:03,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:26:03,997 INFO L87 Difference]: Start difference. First operand 273 states and 329 transitions. Second operand 16 states. [2020-11-07 00:26:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:06,351 INFO L93 Difference]: Finished difference Result 597 states and 715 transitions. [2020-11-07 00:26:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 00:26:06,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 169 [2020-11-07 00:26:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:06,356 INFO L225 Difference]: With dead ends: 597 [2020-11-07 00:26:06,356 INFO L226 Difference]: Without dead ends: 423 [2020-11-07 00:26:06,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2020-11-07 00:26:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-11-07 00:26:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 283. [2020-11-07 00:26:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-11-07 00:26:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 342 transitions. [2020-11-07 00:26:06,430 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 342 transitions. Word has length 169 [2020-11-07 00:26:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:06,431 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 342 transitions. [2020-11-07 00:26:06,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:26:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 342 transitions. [2020-11-07 00:26:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 00:26:06,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:06,432 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:06,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 00:26:06,433 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 241203577, now seen corresponding path program 10 times [2020-11-07 00:26:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:06,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734900693] [2020-11-07 00:26:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:06,592 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:06,596 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:06,597 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:06,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:06,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-11-07 00:26:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:06,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-11-07 00:26:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:06,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-11-07 00:26:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:07,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734900693] [2020-11-07 00:26:07,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:07,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:26:07,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209198671] [2020-11-07 00:26:07,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:26:07,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:26:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:26:07,073 INFO L87 Difference]: Start difference. First operand 283 states and 342 transitions. Second operand 16 states. [2020-11-07 00:26:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:09,519 INFO L93 Difference]: Finished difference Result 519 states and 637 transitions. [2020-11-07 00:26:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 00:26:09,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 169 [2020-11-07 00:26:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:09,522 INFO L225 Difference]: With dead ends: 519 [2020-11-07 00:26:09,522 INFO L226 Difference]: Without dead ends: 347 [2020-11-07 00:26:09,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2020-11-07 00:26:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-11-07 00:26:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 283. [2020-11-07 00:26:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-11-07 00:26:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 342 transitions. [2020-11-07 00:26:09,595 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 342 transitions. Word has length 169 [2020-11-07 00:26:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:09,596 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 342 transitions. [2020-11-07 00:26:09,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:26:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 342 transitions. [2020-11-07 00:26:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-11-07 00:26:09,597 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:09,598 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:09,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 00:26:09,598 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2105483496, now seen corresponding path program 12 times [2020-11-07 00:26:09,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:09,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674402467] [2020-11-07 00:26:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:09,766 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:09,938 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:09,940 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:09,941 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-11-07 00:26:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-11-07 00:26:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 00:26:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:10,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674402467] [2020-11-07 00:26:10,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:10,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:26:10,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251206931] [2020-11-07 00:26:10,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:26:10,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:10,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:26:10,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:26:10,345 INFO L87 Difference]: Start difference. First operand 283 states and 342 transitions. Second operand 17 states. [2020-11-07 00:26:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:12,920 INFO L93 Difference]: Finished difference Result 624 states and 748 transitions. [2020-11-07 00:26:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 00:26:12,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 174 [2020-11-07 00:26:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:12,924 INFO L225 Difference]: With dead ends: 624 [2020-11-07 00:26:12,924 INFO L226 Difference]: Without dead ends: 445 [2020-11-07 00:26:12,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:26:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-11-07 00:26:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 293. [2020-11-07 00:26:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-11-07 00:26:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 355 transitions. [2020-11-07 00:26:12,998 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 355 transitions. Word has length 174 [2020-11-07 00:26:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:12,999 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 355 transitions. [2020-11-07 00:26:12,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:26:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 355 transitions. [2020-11-07 00:26:13,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-11-07 00:26:13,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:13,001 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:13,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 00:26:13,001 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash -86979978, now seen corresponding path program 11 times [2020-11-07 00:26:13,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:13,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968904829] [2020-11-07 00:26:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:13,177 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:13,179 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:13,181 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-11-07 00:26:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-11-07 00:26:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 00:26:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:13,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968904829] [2020-11-07 00:26:13,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:13,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:26:13,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651519262] [2020-11-07 00:26:13,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:26:13,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:26:13,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:26:13,712 INFO L87 Difference]: Start difference. First operand 293 states and 355 transitions. Second operand 17 states. [2020-11-07 00:26:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:16,532 INFO L93 Difference]: Finished difference Result 538 states and 662 transitions. [2020-11-07 00:26:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 00:26:16,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 174 [2020-11-07 00:26:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:16,534 INFO L225 Difference]: With dead ends: 538 [2020-11-07 00:26:16,535 INFO L226 Difference]: Without dead ends: 361 [2020-11-07 00:26:16,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:26:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-11-07 00:26:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 293. [2020-11-07 00:26:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-11-07 00:26:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 355 transitions. [2020-11-07 00:26:16,615 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 355 transitions. Word has length 174 [2020-11-07 00:26:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:16,615 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 355 transitions. [2020-11-07 00:26:16,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:26:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 355 transitions. [2020-11-07 00:26:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 00:26:16,617 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:16,617 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:16,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 00:26:16,618 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash 175826443, now seen corresponding path program 13 times [2020-11-07 00:26:16,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:16,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423965931] [2020-11-07 00:26:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:16,789 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:16,949 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:16,950 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:16,951 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-11-07 00:26:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-11-07 00:26:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-11-07 00:26:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:17,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423965931] [2020-11-07 00:26:17,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:17,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:26:17,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303358710] [2020-11-07 00:26:17,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:26:17,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:17,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:26:17,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=169, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:17,348 INFO L87 Difference]: Start difference. First operand 293 states and 355 transitions. Second operand 18 states. [2020-11-07 00:26:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:19,246 INFO L93 Difference]: Finished difference Result 651 states and 781 transitions. [2020-11-07 00:26:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:26:19,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 179 [2020-11-07 00:26:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:19,249 INFO L225 Difference]: With dead ends: 651 [2020-11-07 00:26:19,249 INFO L226 Difference]: Without dead ends: 467 [2020-11-07 00:26:19,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:26:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-11-07 00:26:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 303. [2020-11-07 00:26:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-11-07 00:26:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 368 transitions. [2020-11-07 00:26:19,332 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 368 transitions. Word has length 179 [2020-11-07 00:26:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:19,333 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 368 transitions. [2020-11-07 00:26:19,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:26:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 368 transitions. [2020-11-07 00:26:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 00:26:19,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:19,334 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:19,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 00:26:19,334 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2016637031, now seen corresponding path program 12 times [2020-11-07 00:26:19,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:19,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695441484] [2020-11-07 00:26:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:19,508 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:19,510 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:19,511 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:20,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-11-07 00:26:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:20,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-11-07 00:26:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-11-07 00:26:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:20,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695441484] [2020-11-07 00:26:20,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:20,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:26:20,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465345273] [2020-11-07 00:26:20,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:26:20,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:26:20,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:20,079 INFO L87 Difference]: Start difference. First operand 303 states and 368 transitions. Second operand 18 states. [2020-11-07 00:26:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:24,054 INFO L93 Difference]: Finished difference Result 557 states and 687 transitions. [2020-11-07 00:26:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:26:24,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 179 [2020-11-07 00:26:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:24,057 INFO L225 Difference]: With dead ends: 557 [2020-11-07 00:26:24,057 INFO L226 Difference]: Without dead ends: 375 [2020-11-07 00:26:24,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:26:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-11-07 00:26:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 303. [2020-11-07 00:26:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-11-07 00:26:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 368 transitions. [2020-11-07 00:26:24,146 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 368 transitions. Word has length 179 [2020-11-07 00:26:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:24,147 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 368 transitions. [2020-11-07 00:26:24,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:26:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 368 transitions. [2020-11-07 00:26:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-11-07 00:26:24,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:24,148 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:24,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 00:26:24,149 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash -926163256, now seen corresponding path program 14 times [2020-11-07 00:26:24,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:24,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329787807] [2020-11-07 00:26:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:24,322 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:24,492 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:24,494 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:24,495 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-11-07 00:26:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-11-07 00:26:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-11-07 00:26:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329787807] [2020-11-07 00:26:24,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:24,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 00:26:24,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188083801] [2020-11-07 00:26:24,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 00:26:24,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:24,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 00:26:24,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=188, Unknown=0, NotChecked=0, Total=342 [2020-11-07 00:26:24,970 INFO L87 Difference]: Start difference. First operand 303 states and 368 transitions. Second operand 19 states. [2020-11-07 00:26:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:27,991 INFO L93 Difference]: Finished difference Result 678 states and 814 transitions. [2020-11-07 00:26:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:26:27,992 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 184 [2020-11-07 00:26:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:27,995 INFO L225 Difference]: With dead ends: 678 [2020-11-07 00:26:27,995 INFO L226 Difference]: Without dead ends: 489 [2020-11-07 00:26:27,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 00:26:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-11-07 00:26:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 313. [2020-11-07 00:26:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 00:26:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 381 transitions. [2020-11-07 00:26:28,094 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 381 transitions. Word has length 184 [2020-11-07 00:26:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:28,095 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 381 transitions. [2020-11-07 00:26:28,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 00:26:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 381 transitions. [2020-11-07 00:26:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-11-07 00:26:28,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:28,096 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:28,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 00:26:28,097 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1176340566, now seen corresponding path program 13 times [2020-11-07 00:26:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:28,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770511936] [2020-11-07 00:26:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:28,268 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:28,269 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:28,270 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-11-07 00:26:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-11-07 00:26:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-11-07 00:26:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:28,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770511936] [2020-11-07 00:26:28,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:28,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 00:26:28,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018101318] [2020-11-07 00:26:28,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 00:26:28,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:28,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 00:26:28,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-11-07 00:26:28,860 INFO L87 Difference]: Start difference. First operand 313 states and 381 transitions. Second operand 19 states. [2020-11-07 00:26:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:32,670 INFO L93 Difference]: Finished difference Result 576 states and 712 transitions. [2020-11-07 00:26:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:26:32,674 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 184 [2020-11-07 00:26:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:32,676 INFO L225 Difference]: With dead ends: 576 [2020-11-07 00:26:32,676 INFO L226 Difference]: Without dead ends: 389 [2020-11-07 00:26:32,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 00:26:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-11-07 00:26:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 313. [2020-11-07 00:26:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 00:26:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 381 transitions. [2020-11-07 00:26:32,774 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 381 transitions. Word has length 184 [2020-11-07 00:26:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:32,774 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 381 transitions. [2020-11-07 00:26:32,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 00:26:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 381 transitions. [2020-11-07 00:26:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-07 00:26:32,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:32,776 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:32,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 00:26:32,777 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -254159829, now seen corresponding path program 15 times [2020-11-07 00:26:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:32,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820866009] [2020-11-07 00:26:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:32,964 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:33,139 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:33,141 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:33,142 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-11-07 00:26:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-11-07 00:26:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-11-07 00:26:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820866009] [2020-11-07 00:26:33,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:33,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:26:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764912187] [2020-11-07 00:26:33,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:26:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:33,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:26:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:26:33,639 INFO L87 Difference]: Start difference. First operand 313 states and 381 transitions. Second operand 20 states. [2020-11-07 00:26:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:36,673 INFO L93 Difference]: Finished difference Result 705 states and 847 transitions. [2020-11-07 00:26:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:26:36,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-11-07 00:26:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:36,677 INFO L225 Difference]: With dead ends: 705 [2020-11-07 00:26:36,677 INFO L226 Difference]: Without dead ends: 511 [2020-11-07 00:26:36,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 00:26:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-11-07 00:26:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 323. [2020-11-07 00:26:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-07 00:26:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 394 transitions. [2020-11-07 00:26:36,775 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 394 transitions. Word has length 189 [2020-11-07 00:26:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:36,775 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 394 transitions. [2020-11-07 00:26:36,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:26:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 394 transitions. [2020-11-07 00:26:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-07 00:26:36,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:36,777 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:36,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 00:26:36,777 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1848343993, now seen corresponding path program 14 times [2020-11-07 00:26:36,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:36,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386083342] [2020-11-07 00:26:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:36,953 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:36,955 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:36,956 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-11-07 00:26:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-11-07 00:26:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-11-07 00:26:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:37,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386083342] [2020-11-07 00:26:37,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:37,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:26:37,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890427862] [2020-11-07 00:26:37,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:26:37,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:37,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:26:37,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:26:37,626 INFO L87 Difference]: Start difference. First operand 323 states and 394 transitions. Second operand 20 states. [2020-11-07 00:26:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:42,077 INFO L93 Difference]: Finished difference Result 595 states and 737 transitions. [2020-11-07 00:26:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:26:42,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-11-07 00:26:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:42,081 INFO L225 Difference]: With dead ends: 595 [2020-11-07 00:26:42,081 INFO L226 Difference]: Without dead ends: 403 [2020-11-07 00:26:42,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 00:26:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-11-07 00:26:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 323. [2020-11-07 00:26:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-07 00:26:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 394 transitions. [2020-11-07 00:26:42,159 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 394 transitions. Word has length 189 [2020-11-07 00:26:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:42,159 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 394 transitions. [2020-11-07 00:26:42,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:26:42,159 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 394 transitions. [2020-11-07 00:26:42,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-07 00:26:42,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:42,161 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:42,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 00:26:42,161 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2060663640, now seen corresponding path program 16 times [2020-11-07 00:26:42,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:42,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597346917] [2020-11-07 00:26:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:42,350 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:42,526 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:42,527 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:42,528 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-11-07 00:26:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-11-07 00:26:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-11-07 00:26:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:43,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597346917] [2020-11-07 00:26:43,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:43,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 00:26:43,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914905971] [2020-11-07 00:26:43,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 00:26:43,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 00:26:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=229, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:26:43,176 INFO L87 Difference]: Start difference. First operand 323 states and 394 transitions. Second operand 21 states. [2020-11-07 00:26:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:46,629 INFO L93 Difference]: Finished difference Result 732 states and 880 transitions. [2020-11-07 00:26:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:26:46,633 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 194 [2020-11-07 00:26:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:46,636 INFO L225 Difference]: With dead ends: 732 [2020-11-07 00:26:46,636 INFO L226 Difference]: Without dead ends: 533 [2020-11-07 00:26:46,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 00:26:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-11-07 00:26:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 333. [2020-11-07 00:26:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-11-07 00:26:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 407 transitions. [2020-11-07 00:26:46,743 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 407 transitions. Word has length 194 [2020-11-07 00:26:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:46,743 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 407 transitions. [2020-11-07 00:26:46,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 00:26:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 407 transitions. [2020-11-07 00:26:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-07 00:26:46,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:46,745 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:46,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 00:26:46,745 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:46,746 INFO L82 PathProgramCache]: Analyzing trace with hash 41840182, now seen corresponding path program 15 times [2020-11-07 00:26:46,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:46,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775584243] [2020-11-07 00:26:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:46,929 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:46,930 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:46,931 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:47,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-11-07 00:26:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:47,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-11-07 00:26:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:47,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-11-07 00:26:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:47,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775584243] [2020-11-07 00:26:47,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:47,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 00:26:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730803379] [2020-11-07 00:26:47,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 00:26:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:47,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 00:26:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:26:47,594 INFO L87 Difference]: Start difference. First operand 333 states and 407 transitions. Second operand 21 states. [2020-11-07 00:26:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:51,809 INFO L93 Difference]: Finished difference Result 614 states and 762 transitions. [2020-11-07 00:26:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:26:51,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 194 [2020-11-07 00:26:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:51,813 INFO L225 Difference]: With dead ends: 614 [2020-11-07 00:26:51,813 INFO L226 Difference]: Without dead ends: 417 [2020-11-07 00:26:51,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 00:26:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-11-07 00:26:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 333. [2020-11-07 00:26:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-11-07 00:26:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 407 transitions. [2020-11-07 00:26:51,897 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 407 transitions. Word has length 194 [2020-11-07 00:26:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:51,898 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 407 transitions. [2020-11-07 00:26:51,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 00:26:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 407 transitions. [2020-11-07 00:26:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 00:26:51,899 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:51,899 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:51,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 00:26:51,900 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash 880646731, now seen corresponding path program 17 times [2020-11-07 00:26:51,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:51,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300396582] [2020-11-07 00:26:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:52,077 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:52,260 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:52,262 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:52,263 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-11-07 00:26:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-11-07 00:26:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-11-07 00:26:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:52,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300396582] [2020-11-07 00:26:52,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:52,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:26:52,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36941329] [2020-11-07 00:26:52,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:26:52,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:52,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:26:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=251, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:26:52,837 INFO L87 Difference]: Start difference. First operand 333 states and 407 transitions. Second operand 22 states. [2020-11-07 00:26:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:56,376 INFO L93 Difference]: Finished difference Result 759 states and 913 transitions. [2020-11-07 00:26:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 00:26:56,377 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 199 [2020-11-07 00:26:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:56,380 INFO L225 Difference]: With dead ends: 759 [2020-11-07 00:26:56,380 INFO L226 Difference]: Without dead ends: 555 [2020-11-07 00:26:56,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 00:26:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-11-07 00:26:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 343. [2020-11-07 00:26:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 00:26:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 420 transitions. [2020-11-07 00:26:56,475 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 420 transitions. Word has length 199 [2020-11-07 00:26:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:56,475 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 420 transitions. [2020-11-07 00:26:56,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:26:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 420 transitions. [2020-11-07 00:26:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 00:26:56,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:56,477 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:56,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 00:26:56,477 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:56,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1311816743, now seen corresponding path program 16 times [2020-11-07 00:26:56,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:56,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665359171] [2020-11-07 00:26:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:56,670 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:56,672 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:56,673 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:56,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:56,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:56,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:57,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-11-07 00:26:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:57,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-11-07 00:26:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:57,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-11-07 00:26:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:57,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665359171] [2020-11-07 00:26:57,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:57,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:26:57,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495418267] [2020-11-07 00:26:57,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:26:57,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:26:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:26:57,421 INFO L87 Difference]: Start difference. First operand 343 states and 420 transitions. Second operand 22 states. [2020-11-07 00:27:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:03,289 INFO L93 Difference]: Finished difference Result 633 states and 787 transitions. [2020-11-07 00:27:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 00:27:03,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 199 [2020-11-07 00:27:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:03,292 INFO L225 Difference]: With dead ends: 633 [2020-11-07 00:27:03,292 INFO L226 Difference]: Without dead ends: 431 [2020-11-07 00:27:03,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 00:27:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-11-07 00:27:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 343. [2020-11-07 00:27:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 00:27:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 420 transitions. [2020-11-07 00:27:03,377 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 420 transitions. Word has length 199 [2020-11-07 00:27:03,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:03,377 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 420 transitions. [2020-11-07 00:27:03,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:27:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 420 transitions. [2020-11-07 00:27:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-11-07 00:27:03,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:03,379 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:03,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 00:27:03,379 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 630182536, now seen corresponding path program 18 times [2020-11-07 00:27:03,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:03,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329194182] [2020-11-07 00:27:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:03,561 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:03,752 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:03,754 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:03,755 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:03,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:03,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:03,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:04,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-11-07 00:27:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-11-07 00:27:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:04,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-11-07 00:27:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:04,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329194182] [2020-11-07 00:27:04,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:04,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 00:27:04,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905665240] [2020-11-07 00:27:04,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 00:27:04,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 00:27:04,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2020-11-07 00:27:04,381 INFO L87 Difference]: Start difference. First operand 343 states and 420 transitions. Second operand 23 states. [2020-11-07 00:27:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:06,955 INFO L93 Difference]: Finished difference Result 786 states and 946 transitions. [2020-11-07 00:27:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:27:06,955 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 204 [2020-11-07 00:27:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:06,959 INFO L225 Difference]: With dead ends: 786 [2020-11-07 00:27:06,959 INFO L226 Difference]: Without dead ends: 577 [2020-11-07 00:27:06,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:27:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-11-07 00:27:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 353. [2020-11-07 00:27:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-11-07 00:27:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 433 transitions. [2020-11-07 00:27:07,080 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 433 transitions. Word has length 204 [2020-11-07 00:27:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:07,080 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 433 transitions. [2020-11-07 00:27:07,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 00:27:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 433 transitions. [2020-11-07 00:27:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-11-07 00:27:07,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:07,082 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:07,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 00:27:07,082 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1562280938, now seen corresponding path program 17 times [2020-11-07 00:27:07,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:07,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229448850] [2020-11-07 00:27:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:07,267 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:07,269 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:07,270 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-11-07 00:27:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:08,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-11-07 00:27:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:08,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-11-07 00:27:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:08,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229448850] [2020-11-07 00:27:08,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:08,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 00:27:08,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024032020] [2020-11-07 00:27:08,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 00:27:08,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:08,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 00:27:08,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-07 00:27:08,106 INFO L87 Difference]: Start difference. First operand 353 states and 433 transitions. Second operand 23 states. [2020-11-07 00:27:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:14,493 INFO L93 Difference]: Finished difference Result 652 states and 812 transitions. [2020-11-07 00:27:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:27:14,495 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 204 [2020-11-07 00:27:14,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:14,497 INFO L225 Difference]: With dead ends: 652 [2020-11-07 00:27:14,497 INFO L226 Difference]: Without dead ends: 445 [2020-11-07 00:27:14,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:27:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-11-07 00:27:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 353. [2020-11-07 00:27:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-11-07 00:27:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 433 transitions. [2020-11-07 00:27:14,600 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 433 transitions. Word has length 204 [2020-11-07 00:27:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:14,600 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 433 transitions. [2020-11-07 00:27:14,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 00:27:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 433 transitions. [2020-11-07 00:27:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-11-07 00:27:14,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:14,601 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:14,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 00:27:14,601 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash 121124971, now seen corresponding path program 19 times [2020-11-07 00:27:14,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:14,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072668337] [2020-11-07 00:27:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:14,793 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:14,984 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:14,986 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:14,987 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:15,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:15,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:15,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:15,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-11-07 00:27:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:15,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-11-07 00:27:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:15,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-11-07 00:27:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:15,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072668337] [2020-11-07 00:27:15,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:15,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:27:15,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122979099] [2020-11-07 00:27:15,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:27:15,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:15,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:27:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:27:15,651 INFO L87 Difference]: Start difference. First operand 353 states and 433 transitions. Second operand 24 states. [2020-11-07 00:27:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:18,788 INFO L93 Difference]: Finished difference Result 813 states and 979 transitions. [2020-11-07 00:27:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:27:18,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-11-07 00:27:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:18,792 INFO L225 Difference]: With dead ends: 813 [2020-11-07 00:27:18,792 INFO L226 Difference]: Without dead ends: 599 [2020-11-07 00:27:18,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:27:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-11-07 00:27:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 363. [2020-11-07 00:27:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-11-07 00:27:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 446 transitions. [2020-11-07 00:27:18,920 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 446 transitions. Word has length 209 [2020-11-07 00:27:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:18,920 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 446 transitions. [2020-11-07 00:27:18,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:27:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 446 transitions. [2020-11-07 00:27:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-11-07 00:27:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:18,922 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:18,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 00:27:18,922 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2071338503, now seen corresponding path program 18 times [2020-11-07 00:27:18,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:18,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444471433] [2020-11-07 00:27:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:19,134 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:19,135 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:19,136 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-11-07 00:27:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-11-07 00:27:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-11-07 00:27:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:20,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444471433] [2020-11-07 00:27:20,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:20,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:27:20,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421473415] [2020-11-07 00:27:20,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:27:20,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:27:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:27:20,005 INFO L87 Difference]: Start difference. First operand 363 states and 446 transitions. Second operand 24 states. [2020-11-07 00:27:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:26,916 INFO L93 Difference]: Finished difference Result 671 states and 837 transitions. [2020-11-07 00:27:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:27:26,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-11-07 00:27:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:26,920 INFO L225 Difference]: With dead ends: 671 [2020-11-07 00:27:26,920 INFO L226 Difference]: Without dead ends: 459 [2020-11-07 00:27:26,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:27:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-11-07 00:27:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 363. [2020-11-07 00:27:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-11-07 00:27:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 446 transitions. [2020-11-07 00:27:27,007 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 446 transitions. Word has length 209 [2020-11-07 00:27:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:27,007 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 446 transitions. [2020-11-07 00:27:27,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:27:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 446 transitions. [2020-11-07 00:27:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-07 00:27:27,008 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:27,009 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:27,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 00:27:27,009 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -882702232, now seen corresponding path program 20 times [2020-11-07 00:27:27,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:27,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210056034] [2020-11-07 00:27:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:27,197 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:27,385 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:27,387 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:27,388 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:28,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-11-07 00:27:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:28,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-11-07 00:27:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:28,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-11-07 00:27:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:28,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210056034] [2020-11-07 00:27:28,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:28,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:27:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104110765] [2020-11-07 00:27:28,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:27:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:27:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=323, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:27:28,124 INFO L87 Difference]: Start difference. First operand 363 states and 446 transitions. Second operand 25 states. [2020-11-07 00:27:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:31,401 INFO L93 Difference]: Finished difference Result 840 states and 1012 transitions. [2020-11-07 00:27:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 00:27:31,401 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 214 [2020-11-07 00:27:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:31,405 INFO L225 Difference]: With dead ends: 840 [2020-11-07 00:27:31,405 INFO L226 Difference]: Without dead ends: 621 [2020-11-07 00:27:31,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 00:27:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-11-07 00:27:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 373. [2020-11-07 00:27:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-11-07 00:27:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 459 transitions. [2020-11-07 00:27:31,527 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 459 transitions. Word has length 214 [2020-11-07 00:27:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:31,528 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 459 transitions. [2020-11-07 00:27:31,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:27:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 459 transitions. [2020-11-07 00:27:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-07 00:27:31,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:31,530 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:31,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 00:27:31,530 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1219801590, now seen corresponding path program 19 times [2020-11-07 00:27:31,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:31,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647686993] [2020-11-07 00:27:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:31,723 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:31,725 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:31,726 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:32,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-11-07 00:27:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:32,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-11-07 00:27:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:32,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-11-07 00:27:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:32,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647686993] [2020-11-07 00:27:32,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:32,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:27:32,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901997481] [2020-11-07 00:27:32,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:27:32,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:32,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:27:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:27:32,749 INFO L87 Difference]: Start difference. First operand 373 states and 459 transitions. Second operand 25 states. [2020-11-07 00:27:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:38,647 INFO L93 Difference]: Finished difference Result 690 states and 862 transitions. [2020-11-07 00:27:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 00:27:38,649 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 214 [2020-11-07 00:27:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:38,651 INFO L225 Difference]: With dead ends: 690 [2020-11-07 00:27:38,651 INFO L226 Difference]: Without dead ends: 473 [2020-11-07 00:27:38,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 00:27:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-11-07 00:27:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 373. [2020-11-07 00:27:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-11-07 00:27:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 459 transitions. [2020-11-07 00:27:38,756 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 459 transitions. Word has length 214 [2020-11-07 00:27:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:38,756 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 459 transitions. [2020-11-07 00:27:38,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:27:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 459 transitions. [2020-11-07 00:27:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-07 00:27:38,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:38,758 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:38,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 00:27:38,759 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -61100405, now seen corresponding path program 21 times [2020-11-07 00:27:38,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:38,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043882614] [2020-11-07 00:27:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:38,961 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:39,161 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:39,163 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:39,164 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:39,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:39,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:39,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:39,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-11-07 00:27:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:39,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-11-07 00:27:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:39,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-11-07 00:27:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:39,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043882614] [2020-11-07 00:27:39,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:39,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 00:27:39,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776220162] [2020-11-07 00:27:39,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 00:27:39,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:39,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 00:27:39,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:27:39,920 INFO L87 Difference]: Start difference. First operand 373 states and 459 transitions. Second operand 26 states. [2020-11-07 00:27:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:44,108 INFO L93 Difference]: Finished difference Result 867 states and 1045 transitions. [2020-11-07 00:27:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:44,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-11-07 00:27:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:44,112 INFO L225 Difference]: With dead ends: 867 [2020-11-07 00:27:44,112 INFO L226 Difference]: Without dead ends: 643 [2020-11-07 00:27:44,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 00:27:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-11-07 00:27:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 383. [2020-11-07 00:27:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-07 00:27:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 472 transitions. [2020-11-07 00:27:44,217 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 472 transitions. Word has length 219 [2020-11-07 00:27:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:44,218 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 472 transitions. [2020-11-07 00:27:44,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 00:27:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 472 transitions. [2020-11-07 00:27:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-07 00:27:44,220 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:44,220 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:44,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 00:27:44,220 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2041403417, now seen corresponding path program 20 times [2020-11-07 00:27:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159288297] [2020-11-07 00:27:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:44,436 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:44,438 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:44,439 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:44,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:44,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:44,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:45,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-11-07 00:27:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:45,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-11-07 00:27:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:45,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-11-07 00:27:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:45,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159288297] [2020-11-07 00:27:45,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:45,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 00:27:45,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954775857] [2020-11-07 00:27:45,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 00:27:45,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 00:27:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:27:45,395 INFO L87 Difference]: Start difference. First operand 383 states and 472 transitions. Second operand 26 states. [2020-11-07 00:27:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:52,584 INFO L93 Difference]: Finished difference Result 709 states and 887 transitions. [2020-11-07 00:27:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:52,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-11-07 00:27:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:52,588 INFO L225 Difference]: With dead ends: 709 [2020-11-07 00:27:52,588 INFO L226 Difference]: Without dead ends: 487 [2020-11-07 00:27:52,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=316, Invalid=2134, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 00:27:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-11-07 00:27:52,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 383. [2020-11-07 00:27:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-07 00:27:52,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 472 transitions. [2020-11-07 00:27:52,691 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 472 transitions. Word has length 219 [2020-11-07 00:27:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:52,691 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 472 transitions. [2020-11-07 00:27:52,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 00:27:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 472 transitions. [2020-11-07 00:27:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-11-07 00:27:52,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:52,693 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:52,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 00:27:52,693 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:52,693 INFO L82 PathProgramCache]: Analyzing trace with hash 647259720, now seen corresponding path program 22 times [2020-11-07 00:27:52,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:52,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615392404] [2020-11-07 00:27:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:52,906 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:53,124 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:53,126 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:53,127 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:53,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:53,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:53,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:53,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-11-07 00:27:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:53,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-11-07 00:27:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:53,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-11-07 00:27:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615392404] [2020-11-07 00:27:53,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:53,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:27:53,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301480413] [2020-11-07 00:27:53,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:27:53,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:27:53,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:27:53,950 INFO L87 Difference]: Start difference. First operand 383 states and 472 transitions. Second operand 27 states. [2020-11-07 00:27:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:57,602 INFO L93 Difference]: Finished difference Result 894 states and 1078 transitions. [2020-11-07 00:27:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 00:27:57,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 224 [2020-11-07 00:27:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:57,605 INFO L225 Difference]: With dead ends: 894 [2020-11-07 00:27:57,605 INFO L226 Difference]: Without dead ends: 665 [2020-11-07 00:27:57,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 00:27:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-11-07 00:27:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 393. [2020-11-07 00:27:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-11-07 00:27:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 485 transitions. [2020-11-07 00:27:57,721 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 485 transitions. Word has length 224 [2020-11-07 00:27:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:57,721 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 485 transitions. [2020-11-07 00:27:57,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:27:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 485 transitions. [2020-11-07 00:27:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-11-07 00:27:57,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:57,723 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:57,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 00:27:57,723 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:57,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1545203754, now seen corresponding path program 21 times [2020-11-07 00:27:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:57,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886697947] [2020-11-07 00:27:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:57,945 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:57,946 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:57,947 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:58,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:59,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-11-07 00:27:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:59,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-11-07 00:27:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:59,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-11-07 00:27:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:59,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886697947] [2020-11-07 00:27:59,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:59,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:27:59,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462698356] [2020-11-07 00:27:59,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:27:59,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:27:59,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:27:59,214 INFO L87 Difference]: Start difference. First operand 393 states and 485 transitions. Second operand 27 states. [2020-11-07 00:28:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:08,002 INFO L93 Difference]: Finished difference Result 728 states and 912 transitions. [2020-11-07 00:28:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 00:28:08,003 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 224 [2020-11-07 00:28:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:08,006 INFO L225 Difference]: With dead ends: 728 [2020-11-07 00:28:08,006 INFO L226 Difference]: Without dead ends: 501 [2020-11-07 00:28:08,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 00:28:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-11-07 00:28:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2020-11-07 00:28:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-11-07 00:28:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 485 transitions. [2020-11-07 00:28:08,122 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 485 transitions. Word has length 224 [2020-11-07 00:28:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:08,123 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 485 transitions. [2020-11-07 00:28:08,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:28:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 485 transitions. [2020-11-07 00:28:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 00:28:08,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:08,124 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:08,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 00:28:08,125 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash 683277483, now seen corresponding path program 23 times [2020-11-07 00:28:08,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:08,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047709767] [2020-11-07 00:28:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:08,328 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:08,541 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:08,543 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:08,544 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:08,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:08,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:08,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:09,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-11-07 00:28:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:09,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-11-07 00:28:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:09,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-11-07 00:28:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:28:09,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047709767] [2020-11-07 00:28:09,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:09,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 00:28:09,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668041096] [2020-11-07 00:28:09,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 00:28:09,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 00:28:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=404, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:28:09,410 INFO L87 Difference]: Start difference. First operand 393 states and 485 transitions. Second operand 28 states. [2020-11-07 00:28:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:13,334 INFO L93 Difference]: Finished difference Result 921 states and 1111 transitions. [2020-11-07 00:28:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-07 00:28:13,335 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 229 [2020-11-07 00:28:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:13,340 INFO L225 Difference]: With dead ends: 921 [2020-11-07 00:28:13,340 INFO L226 Difference]: Without dead ends: 687 [2020-11-07 00:28:13,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 00:28:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-11-07 00:28:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 403. [2020-11-07 00:28:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-11-07 00:28:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 498 transitions. [2020-11-07 00:28:13,461 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 498 transitions. Word has length 229 [2020-11-07 00:28:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:13,462 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 498 transitions. [2020-11-07 00:28:13,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 00:28:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 498 transitions. [2020-11-07 00:28:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 00:28:13,463 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:13,463 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:13,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 00:28:13,463 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:13,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1509185991, now seen corresponding path program 22 times [2020-11-07 00:28:13,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:13,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931869673] [2020-11-07 00:28:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:13,674 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:13,676 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:13,677 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:14,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-11-07 00:28:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:14,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-11-07 00:28:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:14,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-11-07 00:28:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:28:14,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931869673] [2020-11-07 00:28:14,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:14,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 00:28:14,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207507672] [2020-11-07 00:28:14,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 00:28:14,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:14,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 00:28:14,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:28:14,861 INFO L87 Difference]: Start difference. First operand 403 states and 498 transitions. Second operand 28 states. [2020-11-07 00:28:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:24,503 INFO L93 Difference]: Finished difference Result 747 states and 937 transitions. [2020-11-07 00:28:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-07 00:28:24,504 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 229 [2020-11-07 00:28:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:24,507 INFO L225 Difference]: With dead ends: 747 [2020-11-07 00:28:24,507 INFO L226 Difference]: Without dead ends: 515 [2020-11-07 00:28:24,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=344, Invalid=2518, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 00:28:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-11-07 00:28:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 403. [2020-11-07 00:28:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-11-07 00:28:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 498 transitions. [2020-11-07 00:28:24,628 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 498 transitions. Word has length 229 [2020-11-07 00:28:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:24,628 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 498 transitions. [2020-11-07 00:28:24,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 00:28:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 498 transitions. [2020-11-07 00:28:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-11-07 00:28:24,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:24,629 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:24,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 00:28:24,630 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1435626536, now seen corresponding path program 24 times [2020-11-07 00:28:24,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:24,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659793922] [2020-11-07 00:28:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:24,845 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:25,053 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:25,055 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:25,057 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:25,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:25,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:25,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:25,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:25,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:25,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:28:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659793922] [2020-11-07 00:28:26,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:26,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:28:26,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587440692] [2020-11-07 00:28:26,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:28:26,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:28:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=433, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:28:26,010 INFO L87 Difference]: Start difference. First operand 403 states and 498 transitions. Second operand 29 states. [2020-11-07 00:28:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:31,043 INFO L93 Difference]: Finished difference Result 948 states and 1144 transitions. [2020-11-07 00:28:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:28:31,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 234 [2020-11-07 00:28:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:31,050 INFO L225 Difference]: With dead ends: 948 [2020-11-07 00:28:31,050 INFO L226 Difference]: Without dead ends: 709 [2020-11-07 00:28:31,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:28:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-11-07 00:28:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 413. [2020-11-07 00:28:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-11-07 00:28:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 511 transitions. [2020-11-07 00:28:31,192 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 511 transitions. Word has length 234 [2020-11-07 00:28:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:31,192 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 511 transitions. [2020-11-07 00:28:31,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:28:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 511 transitions. [2020-11-07 00:28:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-11-07 00:28:31,194 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:31,194 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:31,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 00:28:31,194 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash -756836938, now seen corresponding path program 23 times [2020-11-07 00:28:31,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:31,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335188566] [2020-11-07 00:28:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:31,420 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:31,421 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:31,422 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:28:31,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335188566] [2020-11-07 00:28:31,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:31,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:28:31,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896970073] [2020-11-07 00:28:31,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:28:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:28:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:31,799 INFO L87 Difference]: Start difference. First operand 413 states and 511 transitions. Second operand 11 states. [2020-11-07 00:28:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:33,596 INFO L93 Difference]: Finished difference Result 470 states and 592 transitions. [2020-11-07 00:28:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:28:33,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2020-11-07 00:28:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:33,601 INFO L225 Difference]: With dead ends: 470 [2020-11-07 00:28:33,602 INFO L226 Difference]: Without dead ends: 461 [2020-11-07 00:28:33,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:28:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-11-07 00:28:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2020-11-07 00:28:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-11-07 00:28:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2020-11-07 00:28:33,754 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 234 [2020-11-07 00:28:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:33,754 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2020-11-07 00:28:33,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:28:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2020-11-07 00:28:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-11-07 00:28:33,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:33,757 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:33,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 00:28:33,758 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1646971217, now seen corresponding path program 1 times [2020-11-07 00:28:33,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:33,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918612758] [2020-11-07 00:28:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:34,000 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:34,001 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:34,002 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:34,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:34,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:34,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:34,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-07 00:28:34,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918612758] [2020-11-07 00:28:34,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:34,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:28:34,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458257172] [2020-11-07 00:28:34,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:28:34,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:34,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:28:34,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:28:34,199 INFO L87 Difference]: Start difference. First operand 447 states and 558 transitions. Second operand 7 states. [2020-11-07 00:28:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:35,235 INFO L93 Difference]: Finished difference Result 454 states and 564 transitions. [2020-11-07 00:28:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:28:35,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2020-11-07 00:28:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:35,241 INFO L225 Difference]: With dead ends: 454 [2020-11-07 00:28:35,241 INFO L226 Difference]: Without dead ends: 441 [2020-11-07 00:28:35,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:35,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-11-07 00:28:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2020-11-07 00:28:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-11-07 00:28:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 550 transitions. [2020-11-07 00:28:35,374 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 550 transitions. Word has length 236 [2020-11-07 00:28:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:35,374 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 550 transitions. [2020-11-07 00:28:35,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:28:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 550 transitions. [2020-11-07 00:28:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-11-07 00:28:35,376 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:35,377 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:35,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 00:28:35,377 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1615315333, now seen corresponding path program 1 times [2020-11-07 00:28:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822588146] [2020-11-07 00:28:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:35,380 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 00:28:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-11-07 00:28:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-11-07 00:28:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-11-07 00:28:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:28:35,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822588146] [2020-11-07 00:28:35,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:35,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:28:35,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726812982] [2020-11-07 00:28:35,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:28:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:28:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:28:35,598 INFO L87 Difference]: Start difference. First operand 441 states and 550 transitions. Second operand 6 states. [2020-11-07 00:28:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:36,404 INFO L93 Difference]: Finished difference Result 701 states and 878 transitions. [2020-11-07 00:28:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:28:36,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 239 [2020-11-07 00:28:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:36,411 INFO L225 Difference]: With dead ends: 701 [2020-11-07 00:28:36,412 INFO L226 Difference]: Without dead ends: 289 [2020-11-07 00:28:36,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:28:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-07 00:28:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 272. [2020-11-07 00:28:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-11-07 00:28:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 336 transitions. [2020-11-07 00:28:36,550 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 336 transitions. Word has length 239 [2020-11-07 00:28:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:36,550 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 336 transitions. [2020-11-07 00:28:36,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:28:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 336 transitions. [2020-11-07 00:28:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-07 00:28:36,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:36,552 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:36,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 00:28:36,552 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:36,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1727576548, now seen corresponding path program 1 times [2020-11-07 00:28:36,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:36,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202237779] [2020-11-07 00:28:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:36,808 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:36,810 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:36,811 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 00:28:37,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202237779] [2020-11-07 00:28:37,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:37,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:28:37,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584367943] [2020-11-07 00:28:37,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:28:37,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:28:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:28:37,086 INFO L87 Difference]: Start difference. First operand 272 states and 336 transitions. Second operand 9 states. [2020-11-07 00:28:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:38,541 INFO L93 Difference]: Finished difference Result 327 states and 399 transitions. [2020-11-07 00:28:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:28:38,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 245 [2020-11-07 00:28:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:38,543 INFO L225 Difference]: With dead ends: 327 [2020-11-07 00:28:38,543 INFO L226 Difference]: Without dead ends: 307 [2020-11-07 00:28:38,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:28:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-11-07 00:28:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 278. [2020-11-07 00:28:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-11-07 00:28:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 342 transitions. [2020-11-07 00:28:38,674 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 342 transitions. Word has length 245 [2020-11-07 00:28:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:38,674 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 342 transitions. [2020-11-07 00:28:38,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:28:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 342 transitions. [2020-11-07 00:28:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-11-07 00:28:38,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:38,676 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:38,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 00:28:38,677 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -685351208, now seen corresponding path program 1 times [2020-11-07 00:28:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:38,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149755219] [2020-11-07 00:28:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:38,938 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:38,940 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:38,941 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-11-07 00:28:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:28:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149755219] [2020-11-07 00:28:39,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:39,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:28:39,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690095106] [2020-11-07 00:28:39,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:28:39,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:39,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:28:39,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:39,409 INFO L87 Difference]: Start difference. First operand 278 states and 342 transitions. Second operand 11 states. [2020-11-07 00:28:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:41,414 INFO L93 Difference]: Finished difference Result 344 states and 413 transitions. [2020-11-07 00:28:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:28:41,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 249 [2020-11-07 00:28:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:41,416 INFO L225 Difference]: With dead ends: 344 [2020-11-07 00:28:41,416 INFO L226 Difference]: Without dead ends: 281 [2020-11-07 00:28:41,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:28:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-07 00:28:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-11-07 00:28:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-11-07 00:28:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 342 transitions. [2020-11-07 00:28:41,521 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 342 transitions. Word has length 249 [2020-11-07 00:28:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:41,522 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 342 transitions. [2020-11-07 00:28:41,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:28:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 342 transitions. [2020-11-07 00:28:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-11-07 00:28:41,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:41,523 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:41,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 00:28:41,523 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash -6499881, now seen corresponding path program 1 times [2020-11-07 00:28:41,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:41,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815449065] [2020-11-07 00:28:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:41,731 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:41,733 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:41,734 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-11-07 00:28:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:28:42,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815449065] [2020-11-07 00:28:42,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:42,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:28:42,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475722648] [2020-11-07 00:28:42,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:28:42,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:28:42,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:28:42,102 INFO L87 Difference]: Start difference. First operand 278 states and 342 transitions. Second operand 10 states. [2020-11-07 00:28:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:44,146 INFO L93 Difference]: Finished difference Result 341 states and 412 transitions. [2020-11-07 00:28:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:28:44,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 250 [2020-11-07 00:28:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:44,148 INFO L225 Difference]: With dead ends: 341 [2020-11-07 00:28:44,148 INFO L226 Difference]: Without dead ends: 328 [2020-11-07 00:28:44,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:28:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-11-07 00:28:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 320. [2020-11-07 00:28:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-11-07 00:28:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 391 transitions. [2020-11-07 00:28:44,285 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 391 transitions. Word has length 250 [2020-11-07 00:28:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:44,286 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 391 transitions. [2020-11-07 00:28:44,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:28:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 391 transitions. [2020-11-07 00:28:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-11-07 00:28:44,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:44,288 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:44,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 00:28:44,288 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash 207786891, now seen corresponding path program 1 times [2020-11-07 00:28:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:44,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863118364] [2020-11-07 00:28:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:44,557 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:44,559 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:44,560 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:44,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:44,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:44,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:44,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:44,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:44,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-11-07 00:28:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:28:44,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863118364] [2020-11-07 00:28:44,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:44,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:28:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561534876] [2020-11-07 00:28:44,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:28:44,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:28:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:44,955 INFO L87 Difference]: Start difference. First operand 320 states and 391 transitions. Second operand 11 states. [2020-11-07 00:28:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:47,501 INFO L93 Difference]: Finished difference Result 333 states and 403 transitions. [2020-11-07 00:28:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:28:47,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 253 [2020-11-07 00:28:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:47,506 INFO L225 Difference]: With dead ends: 333 [2020-11-07 00:28:47,506 INFO L226 Difference]: Without dead ends: 306 [2020-11-07 00:28:47,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:28:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-07 00:28:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 277. [2020-11-07 00:28:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-07 00:28:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2020-11-07 00:28:47,615 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 253 [2020-11-07 00:28:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:47,616 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2020-11-07 00:28:47,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:28:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2020-11-07 00:28:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-11-07 00:28:47,617 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:47,617 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:47,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 00:28:47,617 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1976498843, now seen corresponding path program 1 times [2020-11-07 00:28:47,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:47,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527388122] [2020-11-07 00:28:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:47,832 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:47,834 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:47,836 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-11-07 00:28:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-11-07 00:28:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-07 00:28:48,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527388122] [2020-11-07 00:28:48,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:48,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:28:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028058551] [2020-11-07 00:28:48,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:28:48,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:28:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:28:48,348 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand 10 states. [2020-11-07 00:28:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:50,260 INFO L93 Difference]: Finished difference Result 306 states and 347 transitions. [2020-11-07 00:28:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:28:50,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 254 [2020-11-07 00:28:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:50,263 INFO L225 Difference]: With dead ends: 306 [2020-11-07 00:28:50,263 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:28:50,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-11-07 00:28:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:28:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:28:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:28:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:28:50,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 254 [2020-11-07 00:28:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:50,265 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:28:50,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:28:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:28:50,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:28:50,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 00:28:50,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:28:50,891 WARN L194 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-11-07 00:28:51,150 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 35 [2020-11-07 00:28:51,590 WARN L194 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-11-07 00:28:51,723 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 35 [2020-11-07 00:28:51,868 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-11-07 00:28:52,250 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 35 [2020-11-07 00:28:52,937 WARN L194 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 35 [2020-11-07 00:28:53,246 WARN L194 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-11-07 00:28:53,444 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-11-07 00:28:54,056 WARN L194 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-11-07 00:28:54,617 WARN L194 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 35 [2020-11-07 00:28:54,745 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 35 [2020-11-07 00:28:54,925 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-11-07 00:28:55,193 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2020-11-07 00:28:55,718 WARN L194 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 35 [2020-11-07 00:28:55,858 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-11-07 00:28:56,369 WARN L194 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 35 [2020-11-07 00:28:56,708 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 35 [2020-11-07 00:28:56,994 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 35 [2020-11-07 00:28:57,232 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 35 [2020-11-07 00:28:57,997 WARN L194 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 44 [2020-11-07 00:29:34,631 WARN L194 SmtUtils]: Spent 36.63 s on a formula simplification. DAG size of input: 1316 DAG size of output: 730 [2020-11-07 00:29:35,507 WARN L194 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 44 [2020-11-07 00:29:44,354 WARN L194 SmtUtils]: Spent 8.84 s on a formula simplification. DAG size of input: 598 DAG size of output: 42 [2020-11-07 00:30:19,691 WARN L194 SmtUtils]: Spent 35.33 s on a formula simplification. DAG size of input: 1316 DAG size of output: 730 [2020-11-07 00:30:23,442 WARN L194 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 442 DAG size of output: 42 [2020-11-07 00:30:30,246 WARN L194 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 544 DAG size of output: 42 [2020-11-07 00:30:30,678 WARN L194 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 44 [2020-11-07 00:30:51,247 WARN L194 SmtUtils]: Spent 20.51 s on a formula simplification. DAG size of input: 771 DAG size of output: 45 [2020-11-07 00:30:51,378 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 44 [2020-11-07 00:30:53,068 WARN L194 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 348 DAG size of output: 42 [2020-11-07 00:30:54,347 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 305 DAG size of output: 44 [2020-11-07 00:32:11,234 WARN L194 SmtUtils]: Spent 1.28 m on a formula simplification. DAG size of input: 1247 DAG size of output: 44 [2020-11-07 00:32:42,852 WARN L194 SmtUtils]: Spent 31.61 s on a formula simplification. DAG size of input: 897 DAG size of output: 45 [2020-11-07 00:33:18,443 WARN L194 SmtUtils]: Spent 35.59 s on a formula simplification. DAG size of input: 1316 DAG size of output: 730 [2020-11-07 00:34:12,514 WARN L194 SmtUtils]: Spent 54.06 s on a formula simplification. DAG size of input: 1101 DAG size of output: 45 [2020-11-07 00:35:59,828 WARN L194 SmtUtils]: Spent 1.79 m on a formula simplification. DAG size of input: 1288 DAG size of output: 44 [2020-11-07 00:36:12,684 WARN L194 SmtUtils]: Spent 12.84 s on a formula simplification. DAG size of input: 654 DAG size of output: 42 [2020-11-07 00:36:38,260 WARN L194 SmtUtils]: Spent 25.57 s on a formula simplification. DAG size of input: 833 DAG size of output: 45 [2020-11-07 00:37:46,067 WARN L194 SmtUtils]: Spent 1.13 m on a formula simplification. DAG size of input: 1646 DAG size of output: 1074