/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/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:15,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:15,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:15,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:15,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:15,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:15,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:15,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:15,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:15,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:15,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:15,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:15,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:15,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:15,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:15,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:15,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:15,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:16:15,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:15,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:15,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:15,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:15,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:15,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:15,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:15,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:15,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:15,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:15,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:15,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:15,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:15,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:15,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:15,378 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:15,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:15,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:15,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:15,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:15,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:15,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:15,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:15,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:15,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:15,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:15,845 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:15,846 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:15,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2021-02-24 00:16:15,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc474e0de/5120208784c34c459100b21888e0dfd8/FLAGa1c942281 [2021-02-24 00:16:16,574 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:16,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2021-02-24 00:16:16,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc474e0de/5120208784c34c459100b21888e0dfd8/FLAGa1c942281 [2021-02-24 00:16:16,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc474e0de/5120208784c34c459100b21888e0dfd8 [2021-02-24 00:16:16,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:16,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:17,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:17,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:17,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:17,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:16" (1/1) ... [2021-02-24 00:16:17,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f5fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17, skipping insertion in model container [2021-02-24 00:16:17,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:16" (1/1) ... [2021-02-24 00:16:17,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:17,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:17,263 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c[588,601] [2021-02-24 00:16:17,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:17,305 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:17,320 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c[588,601] [2021-02-24 00:16:17,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:17,366 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:17,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17 WrapperNode [2021-02-24 00:16:17,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:17,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:17,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:17,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:17,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (1/1) ... [2021-02-24 00:16:17,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (1/1) ... [2021-02-24 00:16:17,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (1/1) ... [2021-02-24 00:16:17,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (1/1) ... [2021-02-24 00:16:17,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (1/1) ... [2021-02-24 00:16:17,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (1/1) ... [2021-02-24 00:16:17,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (1/1) ... [2021-02-24 00:16:17,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:17,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:17,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:17,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:17,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (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 [2021-02-24 00:16:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:17,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:17,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:17,544 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:17,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:16:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:16:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:18,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:18,123 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 00:16:18,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:18 BoogieIcfgContainer [2021-02-24 00:16:18,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:18,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:18,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:18,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:18,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:16" (1/3) ... [2021-02-24 00:16:18,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19006f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:18, skipping insertion in model container [2021-02-24 00:16:18,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:17" (2/3) ... [2021-02-24 00:16:18,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19006f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:18, skipping insertion in model container [2021-02-24 00:16:18,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:18" (3/3) ... [2021-02-24 00:16:18,135 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2021-02-24 00:16:18,143 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:18,148 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:18,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:18,192 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:18,192 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:18,193 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:18,193 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:18,193 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:18,193 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:18,193 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:18,193 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2021-02-24 00:16:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:16:18,221 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:18,222 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] [2021-02-24 00:16:18,222 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 137751759, now seen corresponding path program 1 times [2021-02-24 00:16:18,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:18,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681243608] [2021-02-24 00:16:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:18,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:18,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:18,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:18,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:18,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:18,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:18,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:18,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:18,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:18,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:18,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681243608] [2021-02-24 00:16:18,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:18,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:18,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779936296] [2021-02-24 00:16:18,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:18,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:18,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:18,750 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2021-02-24 00:16:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:19,101 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-02-24 00:16:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:19,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-24 00:16:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:19,112 INFO L225 Difference]: With dead ends: 119 [2021-02-24 00:16:19,113 INFO L226 Difference]: Without dead ends: 58 [2021-02-24 00:16:19,117 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 [2021-02-24 00:16:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-24 00:16:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-24 00:16:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-24 00:16:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-02-24 00:16:19,175 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 36 [2021-02-24 00:16:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:19,176 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-02-24 00:16:19,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-02-24 00:16:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:16:19,178 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:19,178 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] [2021-02-24 00:16:19,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:19,179 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1632327928, now seen corresponding path program 1 times [2021-02-24 00:16:19,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:19,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786566140] [2021-02-24 00:16:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:19,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:19,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:19,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:19,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:19,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:19,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:19,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:19,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:19,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786566140] [2021-02-24 00:16:19,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:19,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:19,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526520207] [2021-02-24 00:16:19,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:19,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:19,391 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2021-02-24 00:16:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:19,741 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-02-24 00:16:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:19,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-24 00:16:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:19,744 INFO L225 Difference]: With dead ends: 104 [2021-02-24 00:16:19,744 INFO L226 Difference]: Without dead ends: 79 [2021-02-24 00:16:19,746 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 [2021-02-24 00:16:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-24 00:16:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-02-24 00:16:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-24 00:16:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-24 00:16:19,765 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 36 [2021-02-24 00:16:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:19,766 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-24 00:16:19,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-24 00:16:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-24 00:16:19,769 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:19,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:19,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:19,769 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash -881259695, now seen corresponding path program 1 times [2021-02-24 00:16:19,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:19,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134314581] [2021-02-24 00:16:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:19,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:19,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:19,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:16:19,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 00:16:19,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 00:16:19,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:16:19,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:19,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:16:20,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:20,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:20,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:20,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:20,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:16:20,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:16:20,183 WARN L141 QuantifierPusher]: treesize reduction 5, result has 83.3 percent of original size [2021-02-24 00:16:20,184 WARN L147 QuantifierPusher]: treesize reduction 5, result has 83.3 percent of original size 25 [2021-02-24 00:16:20,218 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-02-24 00:16:20,220 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size 40 [2021-02-24 00:16:20,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:16:20,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:20,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:20,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:20,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:20,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:20,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:20,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:20,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:20,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:20,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134314581] [2021-02-24 00:16:20,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:20,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-24 00:16:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456548397] [2021-02-24 00:16:20,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-24 00:16:20,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:20,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-24 00:16:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:16:20,418 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 20 states. [2021-02-24 00:16:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:21,873 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-02-24 00:16:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-24 00:16:21,874 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2021-02-24 00:16:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:21,883 INFO L225 Difference]: With dead ends: 112 [2021-02-24 00:16:21,884 INFO L226 Difference]: Without dead ends: 106 [2021-02-24 00:16:21,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-02-24 00:16:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-24 00:16:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-02-24 00:16:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-24 00:16:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-02-24 00:16:21,943 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 53 [2021-02-24 00:16:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:21,943 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-02-24 00:16:21,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-24 00:16:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-02-24 00:16:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-24 00:16:21,946 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:21,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:21,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:21,947 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1326966967, now seen corresponding path program 1 times [2021-02-24 00:16:21,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:21,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592212276] [2021-02-24 00:16:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:21,968 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-02-24 00:16:21,968 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 00:16:21,968 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:21,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:16:21,991 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 00:16:21,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:21 BoogieIcfgContainer [2021-02-24 00:16:21,992 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:21,993 INFO L168 Benchmark]: Toolchain (without parser) took 5008.93 ms. Allocated memory was 151.0 MB in the beginning and 190.8 MB in the end (delta: 39.8 MB). Free memory was 127.6 MB in the beginning and 109.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 59.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:21,994 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:21,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:21,996 INFO L168 Benchmark]: Boogie Preprocessor took 46.78 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:21,996 INFO L168 Benchmark]: RCFGBuilder took 709.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 132.1 MB in the end (delta: -17.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:21,997 INFO L168 Benchmark]: TraceAbstraction took 3863.97 ms. Allocated memory was 151.0 MB in the beginning and 190.8 MB in the end (delta: 39.8 MB). Free memory was 131.5 MB in the beginning and 109.3 MB in the end (delta: 22.2 MB). Peak memory consumption was 62.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:22,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 365.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.78 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 709.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 132.1 MB in the end (delta: -17.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3863.97 ms. Allocated memory was 151.0 MB in the beginning and 190.8 MB in the end (delta: 39.8 MB). Free memory was 131.5 MB in the beginning and 109.3 MB in the end (delta: 22.2 MB). Peak memory consumption was 62.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 [L32] COND TRUE i