/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/geo3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:44:29,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:44:29,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:44:29,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:44:29,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:44:29,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:44:29,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:44:29,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:44:29,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:44:29,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:44:29,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:44:29,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:44:29,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:44:29,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:44:29,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:44:29,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:44:29,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:44:29,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:44:29,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:44:29,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:44:29,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:44:29,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:44:29,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:44:29,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:44:29,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:44:29,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:44:29,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:44:29,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:44:29,149 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:44:29,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:44:29,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:44:29,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:44:29,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:44:29,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:44:29,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:44:29,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:44:29,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:44:29,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:44:29,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:44:29,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:44:29,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:44:29,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:44:29,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:44:29,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:44:29,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:44:29,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:44:29,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:44:29,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:44:29,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:44:29,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:44:29,174 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:44:29,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:44:29,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:44:29,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:44:29,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:44:29,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:44:29,465 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:44:29,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound5.c [2021-05-06 08:44:29,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fe20ac3/ee7a1c441907402c9e31496ddaaa2b9b/FLAGac8c8d89f [2021-05-06 08:44:29,951 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:44:29,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound5.c [2021-05-06 08:44:29,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fe20ac3/ee7a1c441907402c9e31496ddaaa2b9b/FLAGac8c8d89f [2021-05-06 08:44:30,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fe20ac3/ee7a1c441907402c9e31496ddaaa2b9b [2021-05-06 08:44:30,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:44:30,373 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:44:30,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:44:30,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:44:30,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:44:30,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b59dacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30, skipping insertion in model container [2021-05-06 08:44:30,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:44:30,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:44:30,503 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/geo3-ll_valuebound5.c[525,538] [2021-05-06 08:44:30,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:44:30,522 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:44:30,582 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/geo3-ll_valuebound5.c[525,538] [2021-05-06 08:44:30,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:44:30,611 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:44:30,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30 WrapperNode [2021-05-06 08:44:30,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:44:30,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:44:30,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:44:30,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:44:30,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (1/1) ... [2021-05-06 08:44:30,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:44:30,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:44:30,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:44:30,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:44:30,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (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 08:44:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:44:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:44:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:44:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:44:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:44:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:44:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:44:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:44:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:44:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:44:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:44:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:44:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:44:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:44:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:44:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:44:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:44:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:44:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:44:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:44:31,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:44:31,046 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:44:31,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:44:31 BoogieIcfgContainer [2021-05-06 08:44:31,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:44:31,048 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:44:31,049 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:44:31,049 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:44:31,052 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:44:31" (1/1) ... [2021-05-06 08:44:31,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:44:31 BasicIcfg [2021-05-06 08:44:31,077 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:44:31,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:44:31,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:44:31,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:44:31,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:44:30" (1/4) ... [2021-05-06 08:44:31,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3347ee28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:44:31, skipping insertion in model container [2021-05-06 08:44:31,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:44:30" (2/4) ... [2021-05-06 08:44:31,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3347ee28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:44:31, skipping insertion in model container [2021-05-06 08:44:31,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:44:31" (3/4) ... [2021-05-06 08:44:31,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3347ee28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:44:31, skipping insertion in model container [2021-05-06 08:44:31,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:44:31" (4/4) ... [2021-05-06 08:44:31,087 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound5.cJordan [2021-05-06 08:44:31,092 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:44:31,097 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:44:31,112 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:44:31,136 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:44:31,137 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:44:31,137 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:44:31,137 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:44:31,137 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:44:31,137 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:44:31,137 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:44:31,137 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:44:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:44:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:44:31,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:44:31,161 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:44:31,162 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:44:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:44:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1338008438, now seen corresponding path program 1 times [2021-05-06 08:44:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:44:31,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168449331] [2021-05-06 08:44:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:44:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:44:31,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:44:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:44:31,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:44:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:44:31,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:44:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:44:31,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 08:44:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:44:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:44:31,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:44:31,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168449331] [2021-05-06 08:44:31,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168449331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:44:31,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:44:31,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:44:31,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406432875] [2021-05-06 08:44:31,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:44:31,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:44:31,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:44:31,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:44:31,511 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:44:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:44:31,593 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-06 08:44:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:44:31,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 08:44:31,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:44:31,600 INFO L225 Difference]: With dead ends: 31 [2021-05-06 08:44:31,601 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 08:44:31,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:44:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 08:44:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 08:44:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:44:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 08:44:31,628 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2021-05-06 08:44:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:44:31,628 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 08:44:31,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:44:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 08:44:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:44:31,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:44:31,630 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:44:31,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:44:31,630 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:44:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:44:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1251333530, now seen corresponding path program 1 times [2021-05-06 08:44:31,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:44:31,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052301371] [2021-05-06 08:44:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:44:31,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:44:31,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929592183] [2021-05-06 08:44:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:44:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:44:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:44:31,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:44:31,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:31,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:31,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:44:31,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:44:31,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052301371] [2021-05-06 08:44:31,939 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:44:31,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929592183] [2021-05-06 08:44:31,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929592183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:44:31,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:44:31,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:44:31,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89216740] [2021-05-06 08:44:31,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:44:31,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:44:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:44:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:44:31,942 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:44:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:44:31,997 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 08:44:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:44:31,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:44:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:44:31,999 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:44:31,999 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:44:32,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:44:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:44:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:44:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:44:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 08:44:32,005 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-06 08:44:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:44:32,006 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 08:44:32,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:44:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 08:44:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:44:32,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:44:32,008 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:44:32,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:44:32,209 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:44:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:44:32,210 INFO L82 PathProgramCache]: Analyzing trace with hash -284720885, now seen corresponding path program 1 times [2021-05-06 08:44:32,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:44:32,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79177487] [2021-05-06 08:44:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:44:32,243 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:44:32,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861728890] [2021-05-06 08:44:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:44:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:44:32,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:44:32,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:44:32,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:32,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:32,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:44:32,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:44:32,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79177487] [2021-05-06 08:44:32,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:44:32,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861728890] [2021-05-06 08:44:32,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861728890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:44:32,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:44:32,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:44:32,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702531048] [2021-05-06 08:44:32,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:44:32,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:44:32,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:44:32,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:44:32,538 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:44:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:44:32,800 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-06 08:44:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:44:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:44:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:44:32,803 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:44:32,803 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 08:44:32,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:44:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 08:44:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 08:44:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:44:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-06 08:44:32,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2021-05-06 08:44:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:44:32,822 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-06 08:44:32,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:44:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-06 08:44:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:44:32,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:44:32,823 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:44:33,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:44:33,024 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:44:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:44:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash -590068614, now seen corresponding path program 2 times [2021-05-06 08:44:33,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:44:33,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831443040] [2021-05-06 08:44:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:44:33,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:44:33,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943312966] [2021-05-06 08:44:33,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:44:33,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:44:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:44:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:44:33,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:44:33,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 08:44:33,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:44:33,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831443040] [2021-05-06 08:44:33,622 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:44:33,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943312966] [2021-05-06 08:44:33,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943312966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:44:33,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:44:33,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:44:33,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892693983] [2021-05-06 08:44:33,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:44:33,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:44:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:44:33,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:44:33,625 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:44:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:44:33,821 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-05-06 08:44:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:44:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-05-06 08:44:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:44:33,823 INFO L225 Difference]: With dead ends: 48 [2021-05-06 08:44:33,823 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:44:33,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:44:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:44:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 08:44:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:44:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-05-06 08:44:33,828 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2021-05-06 08:44:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:44:33,829 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-05-06 08:44:33,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:44:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-05-06 08:44:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:44:33,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:44:33,830 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:44:34,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:44:34,045 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:44:34,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:44:34,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1588029909, now seen corresponding path program 3 times [2021-05-06 08:44:34,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:44:34,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909146475] [2021-05-06 08:44:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:44:34,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:44:34,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465264175] [2021-05-06 08:44:34,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:44:34,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:44:34,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:44:34,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:44:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:44:37,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:44:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:44:37,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:44:37,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909146475] [2021-05-06 08:44:37,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:44:37,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465264175] [2021-05-06 08:44:37,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465264175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:44:37,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:44:37,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:44:37,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789186186] [2021-05-06 08:44:37,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:44:37,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:44:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:44:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:44:37,835 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:44:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:44:44,382 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-05-06 08:44:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:44:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2021-05-06 08:44:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:44:44,384 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:44:44,384 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:44:44,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3125.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:44:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:44:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:44:44,384 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 08:44:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:44:44,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-06 08:44:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:44:44,385 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:44:44,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:44:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:44:44,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:44:44,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:44:44,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:44:44 BasicIcfg [2021-05-06 08:44:44,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:44:44,591 INFO L168 Benchmark]: Toolchain (without parser) took 14218.26 ms. Allocated memory was 127.9 MB in the beginning and 187.7 MB in the end (delta: 59.8 MB). Free memory was 104.4 MB in the beginning and 80.5 MB in the end (delta: 23.9 MB). Peak memory consumption was 82.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:44:44,591 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory was 109.4 MB in the beginning and 109.3 MB in the end (delta: 124.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:44:44,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.04 ms. Allocated memory was 127.9 MB in the beginning and 187.7 MB in the end (delta: 59.8 MB). Free memory was 104.4 MB in the beginning and 170.0 MB in the end (delta: -65.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:44:44,591 INFO L168 Benchmark]: Boogie Preprocessor took 43.45 ms. Allocated memory is still 187.7 MB. Free memory was 170.0 MB in the beginning and 168.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:44:44,591 INFO L168 Benchmark]: RCFGBuilder took 389.48 ms. Allocated memory is still 187.7 MB. Free memory was 168.6 MB in the beginning and 153.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:44:44,591 INFO L168 Benchmark]: IcfgTransformer took 28.47 ms. Allocated memory is still 187.7 MB. Free memory was 153.9 MB in the beginning and 152.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:44:44,592 INFO L168 Benchmark]: TraceAbstraction took 13511.93 ms. Allocated memory is still 187.7 MB. Free memory was 152.1 MB in the beginning and 80.5 MB in the end (delta: 71.6 MB). Peak memory consumption was 71.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:44:44,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory was 109.4 MB in the beginning and 109.3 MB in the end (delta: 124.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.04 ms. Allocated memory was 127.9 MB in the beginning and 187.7 MB in the end (delta: 59.8 MB). Free memory was 104.4 MB in the beginning and 170.0 MB in the end (delta: -65.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.45 ms. Allocated memory is still 187.7 MB. Free memory was 170.0 MB in the beginning and 168.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 389.48 ms. Allocated memory is still 187.7 MB. Free memory was 168.6 MB in the beginning and 153.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 28.47 ms. Allocated memory is still 187.7 MB. Free memory was 153.9 MB in the beginning and 152.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13511.93 ms. Allocated memory is still 187.7 MB. Free memory was 152.1 MB in the beginning and 80.5 MB in the end (delta: 71.6 MB). Peak memory consumption was 71.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13452.2ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 17.2ms, AutomataDifference: 7177.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 128 SDtfs, 78 SDslu, 471 SDs, 0 SdLazy, 268 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6939.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3507.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=4, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.7ms SsaConstructionTime, 587.2ms SatisfiabilityAnalysisTime, 4347.5ms InterpolantComputationTime, 187 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 182 ConstructedInterpolants, 0 QuantifiedInterpolants, 783 SizeOfPredicates, 10 NumberOfNonLiveVariables, 575 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 93/112 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...