/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:14,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:14,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:14,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:23:14,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:23:14,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:23:14,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:23:14,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:23:14,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:23:14,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:23:14,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:23:14,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:23:14,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:23:14,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:23:14,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:23:14,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:23:14,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:23:14,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:23:14,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:23:14,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:23:14,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:23:14,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:23:14,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:23:14,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:23:14,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:23:14,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:23:14,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:23:14,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:23:14,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:23:15,000 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:15,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:15,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:15,005 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:15,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:15,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:15,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:15,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:15,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:15,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:15,008 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:15,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:15,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:15,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:15,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:15,009 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:15,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:15,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:15,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:15,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:15,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:15,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:15,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:15,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:15,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:15,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:15,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:15,526 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:15,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-24 02:23:15,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70595c12f/fe898a312b894d3d81e0b61540c6a67b/FLAG4773993fc [2020-10-24 02:23:16,239 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:16,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-24 02:23:16,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70595c12f/fe898a312b894d3d81e0b61540c6a67b/FLAG4773993fc [2020-10-24 02:23:16,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70595c12f/fe898a312b894d3d81e0b61540c6a67b [2020-10-24 02:23:16,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:16,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:16,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:16,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:16,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:16,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6802bf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16, skipping insertion in model container [2020-10-24 02:23:16,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:16,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:16,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:16,474 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:16,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:16,515 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:16,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16 WrapperNode [2020-10-24 02:23:16,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:16,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:16,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:16,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:16,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (1/1) ... [2020-10-24 02:23:16,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:16,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:16,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:16,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:16,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (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 [2020-10-24 02:23:16,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:16,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:16,644 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:23:16,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:16,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:23:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:16,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:23:16,647 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:16,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:17,140 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:17,140 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-24 02:23:17,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:17 BoogieIcfgContainer [2020-10-24 02:23:17,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:17,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:17,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:17,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:17,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:16" (1/3) ... [2020-10-24 02:23:17,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268b6d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:17, skipping insertion in model container [2020-10-24 02:23:17,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:16" (2/3) ... [2020-10-24 02:23:17,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268b6d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:17, skipping insertion in model container [2020-10-24 02:23:17,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:17" (3/3) ... [2020-10-24 02:23:17,151 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-10-24 02:23:17,165 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:17,170 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:17,184 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:17,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:17,210 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:17,210 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:17,210 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:17,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:17,211 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:17,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:17,211 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-24 02:23:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:23:17,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:17,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:17,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:17,249 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-10-24 02:23:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:17,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822567518] [2020-10-24 02:23:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,591 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 02:23:17,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:17,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822567518] [2020-10-24 02:23:17,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:17,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:23:17,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686112468] [2020-10-24 02:23:17,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:23:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:23:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:17,651 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-24 02:23:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:17,878 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-24 02:23:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:23:17,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-24 02:23:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:17,888 INFO L225 Difference]: With dead ends: 111 [2020-10-24 02:23:17,889 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:23:17,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:23:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-24 02:23:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 02:23:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-24 02:23:17,943 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-10-24 02:23:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:17,944 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-24 02:23:17,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:23:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-24 02:23:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:23:17,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:17,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:17,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:17,947 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-10-24 02:23:17,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:17,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899149759] [2020-10-24 02:23:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:18,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899149759] [2020-10-24 02:23:18,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:18,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:23:18,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582948001] [2020-10-24 02:23:18,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:23:18,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:18,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:23:18,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:23:18,206 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-10-24 02:23:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:18,515 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-24 02:23:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:23:18,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-24 02:23:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:18,518 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:23:18,518 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 02:23:18,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:23:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 02:23:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-24 02:23:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 02:23:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-24 02:23:18,537 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-10-24 02:23:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:18,538 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-24 02:23:18,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:23:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-24 02:23:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 02:23:18,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:18,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:18,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:18,541 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-10-24 02:23:18,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:18,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228178241] [2020-10-24 02:23:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,892 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 02:23:18,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:23:18,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228178241] [2020-10-24 02:23:18,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:18,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 02:23:18,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931049267] [2020-10-24 02:23:18,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:23:18,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:23:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:23:18,983 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 8 states. [2020-10-24 02:23:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:19,608 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-24 02:23:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:23:19,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-24 02:23:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:19,611 INFO L225 Difference]: With dead ends: 73 [2020-10-24 02:23:19,611 INFO L226 Difference]: Without dead ends: 66 [2020-10-24 02:23:19,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:23:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-24 02:23:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-24 02:23:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 02:23:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-24 02:23:19,625 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2020-10-24 02:23:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:19,626 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-24 02:23:19,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:23:19,626 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-24 02:23:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-24 02:23:19,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:19,628 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 02:23:19,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:23:19,629 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -20855722, now seen corresponding path program 1 times [2020-10-24 02:23:19,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:19,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668979491] [2020-10-24 02:23:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:19,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668979491] [2020-10-24 02:23:19,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:19,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:23:19,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997323439] [2020-10-24 02:23:19,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:23:19,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:19,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:23:19,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:23:19,796 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 10 states. [2020-10-24 02:23:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:20,149 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-24 02:23:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:23:20,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-24 02:23:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:20,151 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:23:20,151 INFO L226 Difference]: Without dead ends: 71 [2020-10-24 02:23:20,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:23:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-24 02:23:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-24 02:23:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:23:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-24 02:23:20,166 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-10-24 02:23:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:20,167 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-24 02:23:20,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:23:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-24 02:23:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 02:23:20,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:20,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-10-24 02:23:20,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:23:20,170 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1036949453, now seen corresponding path program 2 times [2020-10-24 02:23:20,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:20,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524596153] [2020-10-24 02:23:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-24 02:23:20,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524596153] [2020-10-24 02:23:20,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:20,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:23:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107592341] [2020-10-24 02:23:20,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:23:20,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:20,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:23:20,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:23:20,317 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 6 states. [2020-10-24 02:23:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:20,531 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-24 02:23:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:23:20,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-24 02:23:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:20,534 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:23:20,534 INFO L226 Difference]: Without dead ends: 69 [2020-10-24 02:23:20,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:23:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-24 02:23:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-24 02:23:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-24 02:23:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-24 02:23:20,560 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-10-24 02:23:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:20,561 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-24 02:23:20,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:23:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-24 02:23:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 02:23:20,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:20,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-10-24 02:23:20,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:23:20,564 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:20,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1144764371, now seen corresponding path program 1 times [2020-10-24 02:23:20,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:20,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721752654] [2020-10-24 02:23:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:21,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:21,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721752654] [2020-10-24 02:23:21,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:21,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:23:21,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018533342] [2020-10-24 02:23:21,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:23:21,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:23:21,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:23:21,379 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 25 states. [2020-10-24 02:23:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:24,125 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-24 02:23:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 02:23:24,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-24 02:23:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:24,129 INFO L225 Difference]: With dead ends: 138 [2020-10-24 02:23:24,129 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 02:23:24,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:23:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 02:23:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2020-10-24 02:23:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-24 02:23:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-24 02:23:24,172 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 64 [2020-10-24 02:23:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:24,173 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-24 02:23:24,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:23:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-24 02:23:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-24 02:23:24,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:24,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-24 02:23:24,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:23:24,177 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash -285303196, now seen corresponding path program 2 times [2020-10-24 02:23:24,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:24,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856672917] [2020-10-24 02:23:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856672917] [2020-10-24 02:23:24,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:24,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:23:24,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211924919] [2020-10-24 02:23:24,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:23:24,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:23:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:23:24,457 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 14 states. [2020-10-24 02:23:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:25,205 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2020-10-24 02:23:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 02:23:25,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-10-24 02:23:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:25,207 INFO L225 Difference]: With dead ends: 139 [2020-10-24 02:23:25,208 INFO L226 Difference]: Without dead ends: 117 [2020-10-24 02:23:25,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:23:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-24 02:23:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2020-10-24 02:23:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-24 02:23:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-24 02:23:25,228 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-10-24 02:23:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:25,228 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-24 02:23:25,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:23:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-24 02:23:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-24 02:23:25,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:25,230 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-24 02:23:25,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:23:25,231 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 84138786, now seen corresponding path program 3 times [2020-10-24 02:23:25,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:25,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361378801] [2020-10-24 02:23:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:25,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:25,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:25,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361378801] [2020-10-24 02:23:25,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:25,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:23:25,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307767962] [2020-10-24 02:23:25,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:23:25,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:23:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:23:25,420 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 14 states. [2020-10-24 02:23:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:25,942 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-24 02:23:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 02:23:25,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-24 02:23:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:25,944 INFO L225 Difference]: With dead ends: 136 [2020-10-24 02:23:25,944 INFO L226 Difference]: Without dead ends: 86 [2020-10-24 02:23:25,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:23:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-24 02:23:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-24 02:23:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 02:23:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-24 02:23:25,982 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-24 02:23:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:25,983 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-24 02:23:25,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:23:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-24 02:23:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-24 02:23:25,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:25,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2020-10-24 02:23:25,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:23:25,986 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash -923985767, now seen corresponding path program 4 times [2020-10-24 02:23:25,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:25,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510831593] [2020-10-24 02:23:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:26,045 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:26,091 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:26,139 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:23:26,140 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:23:26,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:23:26,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:26 BoogieIcfgContainer [2020-10-24 02:23:26,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:23:26,260 INFO L168 Benchmark]: Toolchain (without parser) took 9992.59 ms. Allocated memory was 151.0 MB in the beginning and 244.3 MB in the end (delta: 93.3 MB). Free memory was 127.2 MB in the beginning and 190.0 MB in the end (delta: -62.8 MB). Peak memory consumption was 31.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,261 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:23:26,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,264 INFO L168 Benchmark]: Boogie Preprocessor took 42.81 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,271 INFO L168 Benchmark]: RCFGBuilder took 582.01 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 96.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,274 INFO L168 Benchmark]: TraceAbstraction took 9113.57 ms. Allocated memory was 151.0 MB in the beginning and 244.3 MB in the end (delta: 93.3 MB). Free memory was 96.3 MB in the beginning and 190.0 MB in the end (delta: -93.7 MB). Peak memory consumption was 683.0 kB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.81 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 582.01 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 96.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9113.57 ms. Allocated memory was 151.0 MB in the beginning and 244.3 MB in the end (delta: 93.3 MB). Free memory was 96.3 MB in the beginning and 190.0 MB in the end (delta: -93.7 MB). Peak memory consumption was 683.0 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=3, N=3] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L27] int i; VAL [\old(N)=0, N=3] [L28] long long sum[1]; VAL [\old(N)=0, N=3, sum={3:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=3, sum={3:0}] [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=3, sum={3:0}] [L31] COND TRUE i