/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/nla-digbench-scaling/dijkstra-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:37:59,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:37:59,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:37:59,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:37:59,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:37:59,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:37:59,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:37:59,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:37:59,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:37:59,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:37:59,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:37:59,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:37:59,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:37:59,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:37:59,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:37:59,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:37:59,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:37:59,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:37:59,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:37:59,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:37:59,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:37:59,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:37:59,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:37:59,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:37:59,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:37:59,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:37:59,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:37:59,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:37:59,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:37:59,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:37:59,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:37:59,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:37:59,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:37:59,634 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:37:59,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:37:59,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:37:59,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:37:59,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:37:59,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:37:59,908 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:37:59,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-05-06 07:37:59,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f02e8c61/15b09681e3b24d35b4523d2c6009f8d1/FLAGc71024f8b [2021-05-06 07:38:00,369 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:38:00,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-05-06 07:38:00,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f02e8c61/15b09681e3b24d35b4523d2c6009f8d1/FLAGc71024f8b [2021-05-06 07:38:00,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f02e8c61/15b09681e3b24d35b4523d2c6009f8d1 [2021-05-06 07:38:00,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:38:00,756 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:38:00,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:38:00,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:38:00,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:38:00,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:38:00" (1/1) ... [2021-05-06 07:38:00,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b85d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:00, skipping insertion in model container [2021-05-06 07:38:00,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:38:00" (1/1) ... [2021-05-06 07:38:00,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:38:00,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:38:00,919 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c[533,546] [2021-05-06 07:38:00,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:38:00,955 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:38:00,977 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c[533,546] [2021-05-06 07:38:01,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:38:01,019 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:38:01,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01 WrapperNode [2021-05-06 07:38:01,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:38:01,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:38:01,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:38:01,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:38:01,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:38:01,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:38:01,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:38:01,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:38:01,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (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 07:38:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:38:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:38:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:38:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:38:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:38:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:38:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:38:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:38:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:38:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:38:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:38:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:38:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:38:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:38:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:38:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:38:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:38:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:38:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:38:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:38:01,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:38:01,385 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:38:01,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:38:01 BoogieIcfgContainer [2021-05-06 07:38:01,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:38:01,389 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:38:01,389 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:38:01,389 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:38:01,391 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:38:01" (1/1) ... [2021-05-06 07:38:01,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:38:01 BasicIcfg [2021-05-06 07:38:01,434 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:38:01,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:38:01,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:38:01,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:38:01,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:38:00" (1/4) ... [2021-05-06 07:38:01,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aba3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:38:01, skipping insertion in model container [2021-05-06 07:38:01,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:38:01" (2/4) ... [2021-05-06 07:38:01,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aba3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:38:01, skipping insertion in model container [2021-05-06 07:38:01,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:38:01" (3/4) ... [2021-05-06 07:38:01,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aba3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:38:01, skipping insertion in model container [2021-05-06 07:38:01,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:38:01" (4/4) ... [2021-05-06 07:38:01,438 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.cJordan [2021-05-06 07:38:01,442 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:38:01,444 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:38:01,474 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:38:01,500 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:38:01,501 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:38:01,501 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:38:01,501 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:38:01,501 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:38:01,501 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:38:01,501 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:38:01,501 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:38:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:38:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:38:01,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:38:01,526 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:38:01,526 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:38:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:38:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2021-05-06 07:38:01,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:38:01,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27088045] [2021-05-06 07:38:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:38:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:38:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:38:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:38:01,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:38:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:38:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:38:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:38:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:38:01,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:38:01,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27088045] [2021-05-06 07:38:01,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27088045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:38:01,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:38:01,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:38:01,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671772878] [2021-05-06 07:38:01,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:38:01,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:38:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:38:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:38:01,767 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:44:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:44:39,488 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2021-05-06 07:44:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:44:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:44:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:44:39,514 INFO L225 Difference]: With dead ends: 38 [2021-05-06 07:44:39,514 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 07:44:39,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:44:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 07:44:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 07:44:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:44:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-06 07:44:39,551 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-06 07:44:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:44:39,551 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-06 07:44:39,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:44:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-06 07:44:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 07:44:39,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:44:39,562 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:44:39,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:44:39,562 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:44:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:44:39,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2021-05-06 07:44:39,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:44:39,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931294803] [2021-05-06 07:44:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:44:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:44:39,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:44:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:44:39,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:44:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:44:39,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:44:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:44:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:44:39,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:44:39,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931294803] [2021-05-06 07:44:39,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931294803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:44:39,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:44:39,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 07:44:39,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913336647] [2021-05-06 07:44:39,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:44:39,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:44:39,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:44:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:44:39,853 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)