/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/ps4-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:26:31,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:26:31,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:26:31,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:26:31,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:26:31,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:26:31,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:26:31,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:26:31,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:26:31,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:26:31,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:26:31,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:26:31,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:26:31,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:26:31,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:26:31,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:26:31,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:26:31,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:26:31,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:26:31,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:26:31,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:26:31,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:26:31,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:26:31,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:26:31,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:26:31,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:26:31,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:26:31,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:26:31,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:26:31,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:26:31,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:26:31,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:26:31,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:26:31,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:26:31,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:26:31,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:26:31,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:26:31,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:26:31,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:26:31,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:26:31,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:26:31,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:26:31,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:26:31,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:26:31,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:26:31,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:26:31,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:26:31,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:26:31,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:26:31,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:26:31,396 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:26:31,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:26:31,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:26:31,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:26:31,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:26:31,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:26:31,649 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:26:31,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound2.c [2021-05-06 10:26:31,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a9a0047/6b719e1f17674a9994d94acb960cbaa9/FLAG2588d7aee [2021-05-06 10:26:32,055 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:26:32,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound2.c [2021-05-06 10:26:32,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a9a0047/6b719e1f17674a9994d94acb960cbaa9/FLAG2588d7aee [2021-05-06 10:26:32,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a9a0047/6b719e1f17674a9994d94acb960cbaa9 [2021-05-06 10:26:32,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:26:32,495 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:26:32,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:26:32,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:26:32,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:26:32,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be2bd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32, skipping insertion in model container [2021-05-06 10:26:32,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:26:32,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:26:32,616 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/ps4-ll_valuebound2.c[458,471] [2021-05-06 10:26:32,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:26:32,647 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:26:32,690 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/ps4-ll_valuebound2.c[458,471] [2021-05-06 10:26:32,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:26:32,713 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:26:32,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32 WrapperNode [2021-05-06 10:26:32,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:26:32,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:26:32,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:26:32,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:26:32,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... [2021-05-06 10:26:32,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:26:32,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:26:32,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:26:32,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:26:32,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:26:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:26:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:26:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:26:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:26:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:26:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:26:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:26:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:26:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:26:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:26:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:26:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:26:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:26:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:26:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:26:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:26:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:26:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:26:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:26:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:26:33,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:26:33,053 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:26:33,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:26:33 BoogieIcfgContainer [2021-05-06 10:26:33,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:26:33,054 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:26:33,054 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:26:33,055 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:26:33,056 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:26:33" (1/1) ... [2021-05-06 10:26:33,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:26:33 BasicIcfg [2021-05-06 10:26:33,078 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:26:33,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:26:33,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:26:33,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:26:33,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:26:32" (1/4) ... [2021-05-06 10:26:33,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557e773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:26:33, skipping insertion in model container [2021-05-06 10:26:33,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:32" (2/4) ... [2021-05-06 10:26:33,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557e773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:26:33, skipping insertion in model container [2021-05-06 10:26:33,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:26:33" (3/4) ... [2021-05-06 10:26:33,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557e773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:26:33, skipping insertion in model container [2021-05-06 10:26:33,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:26:33" (4/4) ... [2021-05-06 10:26:33,096 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound2.cJordan [2021-05-06 10:26:33,099 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:26:33,102 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:26:33,120 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:26:33,135 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:26:33,135 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:26:33,135 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:26:33,135 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:26:33,136 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:26:33,136 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:26:33,136 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:26:33,136 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:26:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:26:33,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:33,150 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:33,150 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2021-05-06 10:26:33,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:33,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059970933] [2021-05-06 10:26:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:33,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:26:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:33,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:26:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:26:33,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059970933] [2021-05-06 10:26:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059970933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:26:33,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:26:33,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:26:33,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848385021] [2021-05-06 10:26:33,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:26:33,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:33,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:26:33,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:26:33,316 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:26:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:33,410 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-06 10:26:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:26:33,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:26:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:33,418 INFO L225 Difference]: With dead ends: 28 [2021-05-06 10:26:33,418 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 10:26:33,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:26:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 10:26:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 10:26:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:26:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 10:26:33,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 10:26:33,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:33,443 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 10:26:33,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:26:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 10:26:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:26:33,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:33,444 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:33,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:26:33,445 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:33,445 INFO L82 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2021-05-06 10:26:33,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:33,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535312558] [2021-05-06 10:26:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:33,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:33,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336762810] [2021-05-06 10:26:33,472 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 10:26:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:33,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:26:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:33,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:26:33,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535312558] [2021-05-06 10:26:33,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:33,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336762810] [2021-05-06 10:26:33,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336762810] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:26:33,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:26:33,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:26:33,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709021815] [2021-05-06 10:26:33,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:26:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:26:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:26:33,681 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:26:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:33,711 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 10:26:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:26:33,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:26:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:33,712 INFO L225 Difference]: With dead ends: 32 [2021-05-06 10:26:33,712 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 10:26:33,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:26:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 10:26:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 10:26:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:26:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 10:26:33,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 10:26:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:33,717 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 10:26:33,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:26:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 10:26:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:26:33,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:33,718 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 10:26:33,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:26:33,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2021-05-06 10:26:33,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:33,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036102323] [2021-05-06 10:26:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:33,946 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:33,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307176390] [2021-05-06 10:26:33,946 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 10:26:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:26:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:34,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:26:34,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:34,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036102323] [2021-05-06 10:26:34,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:34,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307176390] [2021-05-06 10:26:34,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307176390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:34,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:34,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:26:34,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512907896] [2021-05-06 10:26:34,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:26:34,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:34,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:26:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:26:34,081 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:26:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:34,116 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-05-06 10:26:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:26:34,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:26:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:34,117 INFO L225 Difference]: With dead ends: 39 [2021-05-06 10:26:34,117 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:26:34,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:26:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 10:26:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 10:26:34,120 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-06 10:26:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:34,121 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 10:26:34,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:26:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 10:26:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:26:34,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:34,121 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:34,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:34,338 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2021-05-06 10:26:34,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:34,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138257871] [2021-05-06 10:26:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:34,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:34,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818739416] [2021-05-06 10:26:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:26:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:34,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:26:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:34,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:26:34,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:34,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138257871] [2021-05-06 10:26:34,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:34,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818739416] [2021-05-06 10:26:34,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818739416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:34,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:34,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:26:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969525940] [2021-05-06 10:26:34,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:26:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:26:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:34,522 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:34,565 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 10:26:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:26:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 10:26:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:34,566 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:26:34,566 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:26:34,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:26:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:26:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 10:26:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 10:26:34,570 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-06 10:26:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:34,570 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 10:26:34,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 10:26:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 10:26:34,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:34,571 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:34,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:34,792 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:34,792 INFO L82 PathProgramCache]: Analyzing trace with hash -570969308, now seen corresponding path program 2 times [2021-05-06 10:26:34,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:34,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219511066] [2021-05-06 10:26:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:34,799 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:34,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424970259] [2021-05-06 10:26:34,800 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 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 10:26:34,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:26:34,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:34,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:26:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:34,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:26:34,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:34,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219511066] [2021-05-06 10:26:34,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:34,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424970259] [2021-05-06 10:26:34,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424970259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:34,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:34,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:26:34,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66551111] [2021-05-06 10:26:34,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:26:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:26:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:34,970 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:35,030 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-06 10:26:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:26:35,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 10:26:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:35,032 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:26:35,032 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:26:35,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:26:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:26:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:26:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:26:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-06 10:26:35,036 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-06 10:26:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:35,036 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-06 10:26:35,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-06 10:26:35,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:26:35,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:35,037 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:35,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:35,256 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2021-05-06 10:26:35,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:35,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509165514] [2021-05-06 10:26:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:35,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:35,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895384360] [2021-05-06 10:26:35,263 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:35,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:26:35,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:35,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:26:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:35,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:26:35,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509165514] [2021-05-06 10:26:35,418 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895384360] [2021-05-06 10:26:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895384360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:35,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:35,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:26:35,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529307434] [2021-05-06 10:26:35,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:26:35,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:26:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:26:35,420 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:26:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:35,468 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-05-06 10:26:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:26:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:26:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:35,469 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:26:35,469 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 10:26:35,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:26:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 10:26:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 10:26:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:26:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 10:26:35,473 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-06 10:26:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:35,473 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 10:26:35,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:26:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 10:26:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 10:26:35,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:35,474 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:35,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:26:35,688 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1050508662, now seen corresponding path program 3 times [2021-05-06 10:26:35,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:35,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561892142] [2021-05-06 10:26:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:35,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:35,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331973587] [2021-05-06 10:26:35,696 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:35,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:26:35,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:35,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:26:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:35,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 10:26:35,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:35,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561892142] [2021-05-06 10:26:35,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331973587] [2021-05-06 10:26:35,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331973587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:35,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:35,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:26:35,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128919815] [2021-05-06 10:26:35,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:26:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:35,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:26:35,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:35,863 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:26:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:35,911 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-05-06 10:26:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:26:35,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 10:26:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:35,913 INFO L225 Difference]: With dead ends: 48 [2021-05-06 10:26:35,913 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:26:35,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:26:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:26:35,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:26:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 10:26:35,927 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2021-05-06 10:26:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:35,927 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 10:26:35,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:26:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 10:26:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:26:35,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:35,928 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:36,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:36,129 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2021-05-06 10:26:36,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:36,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135990536] [2021-05-06 10:26:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:36,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:36,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469433926] [2021-05-06 10:26:36,136 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:36,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:26:36,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:36,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:26:36,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:36,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-06 10:26:36,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:36,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135990536] [2021-05-06 10:26:36,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:36,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469433926] [2021-05-06 10:26:36,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469433926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:26:36,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:26:36,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 10:26:36,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368237710] [2021-05-06 10:26:36,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:26:36,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:36,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:26:36,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:26:36,352 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 10:26:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:36,390 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-05-06 10:26:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:26:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2021-05-06 10:26:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:36,391 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:26:36,391 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:26:36,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:26:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:26:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:26:36,391 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 10:26:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:26:36,391 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-05-06 10:26:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:36,392 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:26:36,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 10:26:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:26:36,392 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:26:36,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:26:36,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:26:36 BasicIcfg [2021-05-06 10:26:36,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:26:36,613 INFO L168 Benchmark]: Toolchain (without parser) took 4117.70 ms. Allocated memory was 159.4 MB in the beginning and 197.1 MB in the end (delta: 37.7 MB). Free memory was 123.7 MB in the beginning and 141.7 MB in the end (delta: -18.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:36,613 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 159.4 MB. Free memory is still 140.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:26:36,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.74 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 142.2 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:36,613 INFO L168 Benchmark]: Boogie Preprocessor took 28.03 ms. Allocated memory is still 159.4 MB. Free memory was 142.2 MB in the beginning and 141.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:36,613 INFO L168 Benchmark]: RCFGBuilder took 311.14 ms. Allocated memory is still 159.4 MB. Free memory was 141.1 MB in the beginning and 126.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:36,613 INFO L168 Benchmark]: IcfgTransformer took 23.99 ms. Allocated memory is still 159.4 MB. Free memory was 126.5 MB in the beginning and 125.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:36,613 INFO L168 Benchmark]: TraceAbstraction took 3533.39 ms. Allocated memory was 159.4 MB in the beginning and 197.1 MB in the end (delta: 37.7 MB). Free memory was 124.9 MB in the beginning and 141.7 MB in the end (delta: -16.8 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:36,614 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 159.4 MB. Free memory is still 140.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.74 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 142.2 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.03 ms. Allocated memory is still 159.4 MB. Free memory was 142.2 MB in the beginning and 141.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.14 ms. Allocated memory is still 159.4 MB. Free memory was 141.1 MB in the beginning and 126.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 23.99 ms. Allocated memory is still 159.4 MB. Free memory was 126.5 MB in the beginning and 125.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3533.39 ms. Allocated memory was 159.4 MB in the beginning and 197.1 MB in the end (delta: 37.7 MB). Free memory was 124.9 MB in the beginning and 141.7 MB in the end (delta: -16.8 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3479.4ms, OverallIterations: 8, TraceHistogramMax: 5, EmptinessCheckTime: 10.3ms, AutomataDifference: 428.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 199 SDtfs, 62 SDslu, 670 SDs, 0 SdLazy, 270 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 218.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 231 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 262.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 53.5ms SsaConstructionTime, 180.4ms SatisfiabilityAnalysisTime, 885.3ms InterpolantComputationTime, 238 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 682 SizeOfPredicates, 11 NumberOfNonLiveVariables, 914 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 118/140 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...