/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:52:31,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:52:31,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:52:31,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:52:31,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:52:31,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:52:31,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:52:31,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:52:31,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:52:31,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:52:31,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:52:31,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-06 05:52:31,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:52:31,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:52:31,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:52:31,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:52:31,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:52:31,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:52:31,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:52:31,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:52:31,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:52:31,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:52:31,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:52:31,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:52:31,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:52:31,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:52:31,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:52:31,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:52:31,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:52:31,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:52:31,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:52:31,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:52:31,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:52:31,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:52:31,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:52:31,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:52:31,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:52:31,252 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:52:31,260 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:52:31,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:52:31,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:52:31,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:52:31,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:52:31,541 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:52:31,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2021-05-06 05:52:31,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76c0670f9/83267f68d77c4dcb82246c214943e184/FLAG9a7e2400e [2021-05-06 05:52:32,001 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:52:32,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2021-05-06 05:52:32,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76c0670f9/83267f68d77c4dcb82246c214943e184/FLAG9a7e2400e [2021-05-06 05:52:32,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76c0670f9/83267f68d77c4dcb82246c214943e184 [2021-05-06 05:52:32,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:52:32,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:52:32,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:32,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:52:32,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:52:32,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236031bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32, skipping insertion in model container [2021-05-06 05:52:32,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:52:32,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:52:32,530 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i[893,906] [2021-05-06 05:52:32,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:32,561 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:52:32,574 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i[893,906] [2021-05-06 05:52:32,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:32,626 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:52:32,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32 WrapperNode [2021-05-06 05:52:32,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:32,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:52:32,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:52:32,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:52:32,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (1/1) ... [2021-05-06 05:52:32,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:52:32,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:52:32,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:52:32,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:52:32,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (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 [2021-05-06 05:52:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:52:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:52:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:52:32,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:52:32,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:52:32,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:52:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:52:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:52:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 05:52:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 05:52:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:52:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:52:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:52:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:52:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:52:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:52:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:52:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:52:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:52:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:52:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:52:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:52:33,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:52:33,148 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 05:52:33,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:33 BoogieIcfgContainer [2021-05-06 05:52:33,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:52:33,150 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:52:33,150 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:52:33,151 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:52:33,153 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:33" (1/1) ... [2021-05-06 05:52:33,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:33 BasicIcfg [2021-05-06 05:52:33,167 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:52:33,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:52:33,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:52:33,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:52:33,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:52:32" (1/4) ... [2021-05-06 05:52:33,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728b7918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:33, skipping insertion in model container [2021-05-06 05:52:33,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:32" (2/4) ... [2021-05-06 05:52:33,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728b7918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:33, skipping insertion in model container [2021-05-06 05:52:33,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:33" (3/4) ... [2021-05-06 05:52:33,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728b7918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:52:33, skipping insertion in model container [2021-05-06 05:52:33,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:33" (4/4) ... [2021-05-06 05:52:33,178 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.iJordan [2021-05-06 05:52:33,184 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:52:33,188 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:52:33,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:52:33,226 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:52:33,226 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:52:33,226 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:52:33,227 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:52:33,227 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:52:33,227 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:52:33,227 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:52:33,227 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:52:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:52:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:52:33,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:33,254 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:33,254 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:33,259 INFO L82 PathProgramCache]: Analyzing trace with hash -505878006, now seen corresponding path program 1 times [2021-05-06 05:52:33,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:33,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261073360] [2021-05-06 05:52:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:33,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:33,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261073360] [2021-05-06 05:52:33,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261073360] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:33,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:33,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:52:33,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115880990] [2021-05-06 05:52:33,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:52:33,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:52:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:52:33,624 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:52:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:34,253 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-06 05:52:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:52:34,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 05:52:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:34,263 INFO L225 Difference]: With dead ends: 72 [2021-05-06 05:52:34,263 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 05:52:34,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:52:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 05:52:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-05-06 05:52:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 35 states have internal predecessors, (37), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 05:52:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2021-05-06 05:52:34,319 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 17 [2021-05-06 05:52:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:34,320 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2021-05-06 05:52:34,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:52:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2021-05-06 05:52:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:52:34,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:34,321 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:34,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:52:34,322 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash 722598363, now seen corresponding path program 1 times [2021-05-06 05:52:34,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:34,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540273819] [2021-05-06 05:52:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:34,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:52:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:34,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:34,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540273819] [2021-05-06 05:52:34,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540273819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:34,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:34,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:52:34,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507322980] [2021-05-06 05:52:34,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:52:34,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:34,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:52:34,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:52:34,427 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:52:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:34,860 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2021-05-06 05:52:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:52:34,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 05:52:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:34,865 INFO L225 Difference]: With dead ends: 61 [2021-05-06 05:52:34,865 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 05:52:34,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:52:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 05:52:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 05:52:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 05:52:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2021-05-06 05:52:34,886 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 22 [2021-05-06 05:52:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:34,886 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2021-05-06 05:52:34,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:52:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2021-05-06 05:52:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 05:52:34,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:34,889 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:34,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:52:34,892 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash 349034817, now seen corresponding path program 1 times [2021-05-06 05:52:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:34,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159631884] [2021-05-06 05:52:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:34,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:34,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:52:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:34,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:52:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:34,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:52:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:52:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-06 05:52:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-05-06 05:52:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 05:52:35,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:35,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159631884] [2021-05-06 05:52:35,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159631884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:35,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:35,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:52:35,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249607395] [2021-05-06 05:52:35,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:52:35,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:52:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:52:35,026 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:52:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:35,228 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2021-05-06 05:52:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:52:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 51 [2021-05-06 05:52:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:35,230 INFO L225 Difference]: With dead ends: 64 [2021-05-06 05:52:35,230 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 05:52:35,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:52:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 05:52:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 05:52:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 38 states have internal predecessors, (38), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 05:52:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2021-05-06 05:52:35,235 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 51 [2021-05-06 05:52:35,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:35,236 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2021-05-06 05:52:35,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:52:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2021-05-06 05:52:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 05:52:35,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:35,238 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:35,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:52:35,238 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1328286090, now seen corresponding path program 1 times [2021-05-06 05:52:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:35,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157587104] [2021-05-06 05:52:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:52:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:52:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:52:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:52:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-06 05:52:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-06 05:52:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 05:52:35,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:35,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157587104] [2021-05-06 05:52:35,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157587104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:35,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:35,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:52:35,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991338049] [2021-05-06 05:52:35,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:52:35,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:35,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:52:35,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:52:35,348 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:52:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:35,687 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2021-05-06 05:52:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:52:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 05:52:35,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:35,693 INFO L225 Difference]: With dead ends: 66 [2021-05-06 05:52:35,694 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 05:52:35,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:52:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 05:52:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-06 05:52:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 41 states have internal predecessors, (41), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 05:52:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2021-05-06 05:52:35,702 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 52 [2021-05-06 05:52:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:35,703 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2021-05-06 05:52:35,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:52:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2021-05-06 05:52:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 05:52:35,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:35,707 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:35,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 05:52:35,707 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1785526948, now seen corresponding path program 1 times [2021-05-06 05:52:35,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:35,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665199104] [2021-05-06 05:52:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:52:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:52:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:52:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:52:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-06 05:52:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-06 05:52:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-06 05:52:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-06 05:52:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-06 05:52:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-06 05:52:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-05-06 05:52:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-05-06 05:52:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 05:52:35,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:35,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665199104] [2021-05-06 05:52:35,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665199104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:35,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:35,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:52:35,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128059487] [2021-05-06 05:52:35,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:52:35,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:35,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:52:35,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:52:35,853 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 05:52:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:36,150 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2021-05-06 05:52:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:52:36,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2021-05-06 05:52:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:36,152 INFO L225 Difference]: With dead ends: 72 [2021-05-06 05:52:36,152 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 05:52:36,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:52:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 05:52:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-05-06 05:52:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.1) internal successors, (44), 44 states have internal predecessors, (44), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 05:52:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-05-06 05:52:36,159 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 87 [2021-05-06 05:52:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:36,159 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-05-06 05:52:36,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 05:52:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-05-06 05:52:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 05:52:36,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:36,161 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:36,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 05:52:36,161 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash 874819922, now seen corresponding path program 1 times [2021-05-06 05:52:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:36,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326129624] [2021-05-06 05:52:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:52:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:52:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:52:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:52:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-06 05:52:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-06 05:52:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-06 05:52:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-06 05:52:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-06 05:52:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-06 05:52:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-05-06 05:52:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-05-06 05:52:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-05-06 05:52:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 05:52:36,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:36,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326129624] [2021-05-06 05:52:36,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326129624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:36,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:36,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:52:36,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486269223] [2021-05-06 05:52:36,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:52:36,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:52:36,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:52:36,308 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-06 05:52:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:36,646 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2021-05-06 05:52:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:52:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 92 [2021-05-06 05:52:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:36,647 INFO L225 Difference]: With dead ends: 73 [2021-05-06 05:52:36,647 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:52:36,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:52:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:52:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:52:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:52:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:52:36,648 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2021-05-06 05:52:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:36,648 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:52:36,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-06 05:52:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:52:36,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:52:36,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 05:52:36,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:52:36 BasicIcfg [2021-05-06 05:52:36,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:52:36,654 INFO L168 Benchmark]: Toolchain (without parser) took 4261.23 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 145.8 MB in the beginning and 131.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 51.6 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:36,655 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 180.4 MB. Free memory is still 162.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:52:36,655 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.11 ms. Allocated memory is still 180.4 MB. Free memory was 145.7 MB in the beginning and 164.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:36,655 INFO L168 Benchmark]: Boogie Preprocessor took 53.82 ms. Allocated memory is still 180.4 MB. Free memory was 164.3 MB in the beginning and 162.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:36,656 INFO L168 Benchmark]: RCFGBuilder took 465.80 ms. Allocated memory is still 180.4 MB. Free memory was 162.5 MB in the beginning and 142.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:36,656 INFO L168 Benchmark]: IcfgTransformer took 17.47 ms. Allocated memory is still 180.4 MB. Free memory was 142.3 MB in the beginning and 140.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:36,656 INFO L168 Benchmark]: TraceAbstraction took 3484.85 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 140.2 MB in the beginning and 131.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 47.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:36,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 180.4 MB. Free memory is still 162.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.11 ms. Allocated memory is still 180.4 MB. Free memory was 145.7 MB in the beginning and 164.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.82 ms. Allocated memory is still 180.4 MB. Free memory was 164.3 MB in the beginning and 162.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 465.80 ms. Allocated memory is still 180.4 MB. Free memory was 162.5 MB in the beginning and 142.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.47 ms. Allocated memory is still 180.4 MB. Free memory was 142.3 MB in the beginning and 140.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3484.85 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 140.2 MB in the beginning and 131.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 47.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3425.6ms, OverallIterations: 6, TraceHistogramMax: 14, EmptinessCheckTime: 21.9ms, AutomataDifference: 2290.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 294 SDtfs, 277 SDslu, 334 SDs, 0 SdLazy, 1031 SolverSat, 319 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1207.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 824.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=5, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 75.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.3ms SsaConstructionTime, 105.9ms SatisfiabilityAnalysisTime, 753.8ms InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 610 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...