/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/prod4br-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:56:02,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:56:02,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:56:02,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:56:02,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:56:02,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:56:02,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:56:02,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:56:02,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:56:02,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:56:02,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:56:02,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:56:02,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:56:02,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:56:02,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:56:02,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:56:02,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:56:02,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:56:02,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:56:02,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:56:02,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:56:02,675 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:56:02,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:56:02,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:56:02,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:56:02,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:56:02,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:56:02,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:56:02,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:56:02,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:56:02,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:56:02,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:56:02,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:56:02,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:56:02,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:56:02,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:56:02,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:56:02,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:56:02,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:56:02,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:56:02,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:56:02,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:56:02,681 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:56:02,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:56:02,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:56:02,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:56:02,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:56:02,949 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:56:02,950 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:56:02,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c [2021-05-06 09:56:03,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22fdcc15/7dd5c9452c5245f9b899adba3b815172/FLAGd1d528d25 [2021-05-06 09:56:03,357 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:56:03,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c [2021-05-06 09:56:03,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22fdcc15/7dd5c9452c5245f9b899adba3b815172/FLAGd1d528d25 [2021-05-06 09:56:03,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22fdcc15/7dd5c9452c5245f9b899adba3b815172 [2021-05-06 09:56:03,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:56:03,373 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:56:03,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:56:03,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:56:03,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:56:03,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175cab6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03, skipping insertion in model container [2021-05-06 09:56:03,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:56:03,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:56:03,469 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/prod4br-ll_valuebound1.c[524,537] [2021-05-06 09:56:03,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:56:03,484 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:56:03,491 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/prod4br-ll_valuebound1.c[524,537] [2021-05-06 09:56:03,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:56:03,510 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:56:03,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03 WrapperNode [2021-05-06 09:56:03,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:56:03,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:56:03,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:56:03,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:56:03,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:56:03,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:56:03,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:56:03,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:56:03,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (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 09:56:03,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:56:03,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:56:03,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:56:03,668 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:56:03,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:56:03,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:56:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:56:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:56:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:56:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:56:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:56:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:56:03,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:56:03,934 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:56:03,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:56:03 BoogieIcfgContainer [2021-05-06 09:56:03,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:56:03,936 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:56:03,936 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:56:03,936 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:56:03,938 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:56:03" (1/1) ... [2021-05-06 09:56:03,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:56:03 BasicIcfg [2021-05-06 09:56:03,955 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:56:03,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:56:03,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:56:03,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:56:03,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:56:03" (1/4) ... [2021-05-06 09:56:03,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7ea5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:56:03, skipping insertion in model container [2021-05-06 09:56:03,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:56:03" (2/4) ... [2021-05-06 09:56:03,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7ea5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:56:03, skipping insertion in model container [2021-05-06 09:56:03,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:56:03" (3/4) ... [2021-05-06 09:56:03,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7ea5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:56:03, skipping insertion in model container [2021-05-06 09:56:03,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:56:03" (4/4) ... [2021-05-06 09:56:03,963 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound1.cJordan [2021-05-06 09:56:03,967 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:56:03,969 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:56:03,980 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:56:04,002 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:56:04,002 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:56:04,002 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:56:04,002 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:56:04,002 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:56:04,002 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:56:04,002 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:56:04,002 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:56:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:56:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:56:04,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:56:04,019 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] [2021-05-06 09:56:04,019 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:56:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:56:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 574541465, now seen corresponding path program 1 times [2021-05-06 09:56:04,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:56:04,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965262389] [2021-05-06 09:56:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:56:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:04,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:56:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:04,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:56:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:04,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:56:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:04,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:56:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:04,239 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 09:56:04,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:56:04,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965262389] [2021-05-06 09:56:04,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965262389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:56:04,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:56:04,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:56:04,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400112686] [2021-05-06 09:56:04,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:56:04,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:56:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:56:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:56:04,256 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 09:56:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:56:04,327 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-06 09:56:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:56:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 28 [2021-05-06 09:56:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:56:04,333 INFO L225 Difference]: With dead ends: 34 [2021-05-06 09:56:04,333 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 09:56:04,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:56:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 09:56:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 09:56:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:56:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-06 09:56:04,363 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2021-05-06 09:56:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:56:04,363 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-06 09:56:04,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 09:56:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-06 09:56:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:56:04,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:56:04,365 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] [2021-05-06 09:56:04,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:56:04,365 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:56:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:56:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2145419015, now seen corresponding path program 1 times [2021-05-06 09:56:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:56:04,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832662187] [2021-05-06 09:56:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:56:04,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:56:04,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836959270] [2021-05-06 09:56:04,399 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 09:56:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 09:56:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:56:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:04,654 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 09:56:04,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:56:04,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832662187] [2021-05-06 09:56:04,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:56:04,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836959270] [2021-05-06 09:56:04,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836959270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:56:04,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:56:04,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 09:56:04,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127775240] [2021-05-06 09:56:04,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:56:04,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:56:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:56:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:56:04,657 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:56:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:56:04,758 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-06 09:56:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:56:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-06 09:56:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:56:04,759 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:56:04,759 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 09:56:04,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:56:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 09:56:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-05-06 09:56:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:56:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-05-06 09:56:04,765 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2021-05-06 09:56:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:56:04,765 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-05-06 09:56:04,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:56:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-05-06 09:56:04,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 09:56:04,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:56:04,766 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:56:04,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:56:04,983 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:56:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:56:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -257170002, now seen corresponding path program 1 times [2021-05-06 09:56:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:56:04,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083099812] [2021-05-06 09:56:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:56:04,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:56:04,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234441847] [2021-05-06 09:56:04,997 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 09:56:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:56:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:56:05,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:56:05,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:56:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083099812] [2021-05-06 09:56:05,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:56:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234441847] [2021-05-06 09:56:05,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234441847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:56:05,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:56:05,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 09:56:05,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548878893] [2021-05-06 09:56:05,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 09:56:05,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:56:05,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 09:56:05,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:56:05,378 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:56:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:56:20,208 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-05-06 09:56:20,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 09:56:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2021-05-06 09:56:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:56:20,210 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:56:20,210 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 09:56:20,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-06 09:56:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 09:56:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 09:56:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:56:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-05-06 09:56:20,214 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 34 [2021-05-06 09:56:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:56:20,214 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-05-06 09:56:20,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:56:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-05-06 09:56:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:56:20,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:56:20,215 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, 1, 1] [2021-05-06 09:56:20,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:56:20,425 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:56:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:56:20,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1424936990, now seen corresponding path program 1 times [2021-05-06 09:56:20,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:56:20,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329000079] [2021-05-06 09:56:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:56:20,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:56:20,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167047758] [2021-05-06 09:56:20,434 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 09:56:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:20,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:56:20,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:56:20,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:20,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:20,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:20,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:20,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:20,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:20,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 09:56:20,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:56:20,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329000079] [2021-05-06 09:56:20,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:56:20,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167047758] [2021-05-06 09:56:20,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167047758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:56:20,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:56:20,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:56:20,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53093894] [2021-05-06 09:56:20,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:56:20,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:56:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:56:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:56:20,637 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:56:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:56:20,699 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 09:56:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:56:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 09:56:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:56:20,700 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:56:20,700 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 09:56:20,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:56:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 09:56:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 09:56:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:56:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-05-06 09:56:20,703 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 38 [2021-05-06 09:56:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:56:20,703 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-05-06 09:56:20,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:56:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-05-06 09:56:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:56:20,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:56:20,704 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, 1, 1] [2021-05-06 09:56:20,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:56:20,906 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:56:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:56:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1396307839, now seen corresponding path program 1 times [2021-05-06 09:56:20,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:56:20,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073091892] [2021-05-06 09:56:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:56:20,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:56:20,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028562696] [2021-05-06 09:56:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 09:56:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:56:20,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 09:56:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:56:21,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:56:21,287 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 09:56:21,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:56:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073091892] [2021-05-06 09:56:21,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:56:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028562696] [2021-05-06 09:56:21,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028562696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:56:21,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:56:21,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 09:56:21,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117996785] [2021-05-06 09:56:21,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 09:56:21,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:56:21,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 09:56:21,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-06 09:56:21,289 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:56:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:56:21,422 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 09:56:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:56:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-05-06 09:56:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:56:21,423 INFO L225 Difference]: With dead ends: 34 [2021-05-06 09:56:21,423 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 09:56:21,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-06 09:56:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 09:56:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 09:56:21,424 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 09:56:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 09:56:21,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-05-06 09:56:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:56:21,424 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 09:56:21,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:56:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 09:56:21,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 09:56:21,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:56:21,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:56:21 BasicIcfg [2021-05-06 09:56:21,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 09:56:21,636 INFO L168 Benchmark]: Toolchain (without parser) took 18263.05 ms. Allocated memory is still 213.9 MB. Free memory was 178.7 MB in the beginning and 178.8 MB in the end (delta: -62.3 kB). Peak memory consumption was 635.0 kB. Max. memory is 8.0 GB. [2021-05-06 09:56:21,636 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 213.9 MB. Free memory is still 195.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 09:56:21,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.07 ms. Allocated memory is still 213.9 MB. Free memory was 178.5 MB in the beginning and 168.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 09:56:21,637 INFO L168 Benchmark]: Boogie Preprocessor took 57.16 ms. Allocated memory is still 213.9 MB. Free memory was 168.5 MB in the beginning and 196.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. [2021-05-06 09:56:21,638 INFO L168 Benchmark]: RCFGBuilder took 365.88 ms. Allocated memory is still 213.9 MB. Free memory was 196.5 MB in the beginning and 180.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 09:56:21,639 INFO L168 Benchmark]: IcfgTransformer took 19.21 ms. Allocated memory is still 213.9 MB. Free memory was 180.3 MB in the beginning and 178.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 09:56:21,639 INFO L168 Benchmark]: TraceAbstraction took 17678.71 ms. Allocated memory is still 213.9 MB. Free memory was 178.2 MB in the beginning and 178.8 MB in the end (delta: -602.9 kB). Peak memory consumption was 968.0 kB. Max. memory is 8.0 GB. [2021-05-06 09:56:21,640 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 213.9 MB. Free memory is still 195.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 136.07 ms. Allocated memory is still 213.9 MB. Free memory was 178.5 MB in the beginning and 168.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.16 ms. Allocated memory is still 213.9 MB. Free memory was 168.5 MB in the beginning and 196.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 365.88 ms. Allocated memory is still 213.9 MB. Free memory was 196.5 MB in the beginning and 180.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.21 ms. Allocated memory is still 213.9 MB. Free memory was 180.3 MB in the beginning and 178.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17678.71 ms. Allocated memory is still 213.9 MB. Free memory was 178.2 MB in the beginning and 178.8 MB in the end (delta: -602.9 kB). Peak memory consumption was 968.0 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17632.9ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 11.7ms, AutomataDifference: 15223.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 122 SDtfs, 147 SDslu, 477 SDs, 0 SdLazy, 508 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14893.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 631.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=2, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.6ms SsaConstructionTime, 135.1ms SatisfiabilityAnalysisTime, 1074.8ms InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 933 SizeOfPredicates, 20 NumberOfNonLiveVariables, 557 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 60/70 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...