/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/egcd-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:11:57,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:11:57,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:11:57,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:11:57,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:11:57,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:11:57,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:11:57,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:11:57,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:11:57,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:11:57,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:11:57,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:11:57,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:11:57,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:11:57,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:11:57,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:11:57,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:11:57,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:11:57,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:11:57,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:11:57,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:11:57,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:11:57,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:11:57,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:11:57,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:11:57,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:11:57,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:11:57,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:11:57,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:11:57,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:11:57,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:11:57,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:11:57,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:11:57,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:11:57,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:11:57,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:11:57,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:11:57,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:11:57,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:11:57,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:11:57,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:11:57,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:11:57,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:11:57,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:11:57,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:11:57,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:11:57,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:11:57,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:11:57,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:11:57,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:11:57,887 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:11:57,888 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:11:58,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:11:58,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:11:58,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:11:58,224 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:11:58,225 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:11:58,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-06 08:11:58,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae995e7f3/5482953e73864f5b935cbdea723605fd/FLAG3d74277c0 [2021-05-06 08:11:58,711 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:11:58,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-06 08:11:58,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae995e7f3/5482953e73864f5b935cbdea723605fd/FLAG3d74277c0 [2021-05-06 08:11:59,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae995e7f3/5482953e73864f5b935cbdea723605fd [2021-05-06 08:11:59,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:11:59,125 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:11:59,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:11:59,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:11:59,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:11:59,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bfd948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59, skipping insertion in model container [2021-05-06 08:11:59,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:11:59,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:11:59,241 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/egcd-ll_valuebound1.c[489,502] [2021-05-06 08:11:59,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:11:59,329 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:11:59,338 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/egcd-ll_valuebound1.c[489,502] [2021-05-06 08:11:59,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:11:59,366 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:11:59,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59 WrapperNode [2021-05-06 08:11:59,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:11:59,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:11:59,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:11:59,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:11:59,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:11:59,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:11:59,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:11:59,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:11:59,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:11:59,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:11:59,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:11:59,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:11:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:11:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:11:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:11:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:11:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:11:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:11:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:11:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:11:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:11:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:11:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:11:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:11:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:11:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:11:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:11:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:11:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:11:59,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:11:59,745 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:11:59,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:11:59 BoogieIcfgContainer [2021-05-06 08:11:59,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:11:59,746 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:11:59,746 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:11:59,747 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:11:59,765 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:11:59" (1/1) ... [2021-05-06 08:11:59,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:11:59 BasicIcfg [2021-05-06 08:11:59,775 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:11:59,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:11:59,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:11:59,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:11:59,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:11:59" (1/4) ... [2021-05-06 08:11:59,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b010e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:11:59, skipping insertion in model container [2021-05-06 08:11:59,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:59" (2/4) ... [2021-05-06 08:11:59,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b010e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:11:59, skipping insertion in model container [2021-05-06 08:11:59,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:11:59" (3/4) ... [2021-05-06 08:11:59,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b010e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:11:59, skipping insertion in model container [2021-05-06 08:11:59,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:11:59" (4/4) ... [2021-05-06 08:11:59,781 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound1.cJordan [2021-05-06 08:11:59,784 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:11:59,794 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:11:59,805 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:11:59,820 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:11:59,820 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:11:59,821 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:11:59,821 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:11:59,821 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:11:59,821 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:11:59,821 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:11:59,821 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:11:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:11:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:11:59,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:59,846 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:11:59,846 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:59,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-06 08:11:59,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:59,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732865601] [2021-05-06 08:11:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:12:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:12:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:12:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:12:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:12:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:00,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732865601] [2021-05-06 08:12:00,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732865601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:00,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:00,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:12:00,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592175840] [2021-05-06 08:12:00,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:12:00,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:12:00,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:00,114 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:00,226 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:12:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:12:00,227 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:12:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:00,233 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:12:00,233 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:12:00,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:12:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:12:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:12:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:12:00,263 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 08:12:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:00,263 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:12:00,263 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:12:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:00,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:00,265 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:00,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:12:00,265 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-06 08:12:00,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:00,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436063663] [2021-05-06 08:12:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:00,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:00,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891384583] [2021-05-06 08:12:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:12:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:00,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:00,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:00,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436063663] [2021-05-06 08:12:00,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:00,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891384583] [2021-05-06 08:12:00,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891384583] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:00,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:00,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:00,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787792955] [2021-05-06 08:12:00,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:00,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:00,504 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:12:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:00,563 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-06 08:12:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 08:12:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:00,565 INFO L225 Difference]: With dead ends: 46 [2021-05-06 08:12:00,565 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 08:12:00,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 08:12:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 08:12:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:12:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 08:12:00,574 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 08:12:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:00,574 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 08:12:00,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:12:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 08:12:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:12:00,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:00,576 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:00,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:12:00,791 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:00,791 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-06 08:12:00,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:00,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979371457] [2021-05-06 08:12:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:00,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:00,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251981750] [2021-05-06 08:12:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:00,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:12:01,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:01,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979371457] [2021-05-06 08:12:01,130 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:01,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251981750] [2021-05-06 08:12:01,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251981750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:01,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:01,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191453772] [2021-05-06 08:12:01,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:01,131 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 08:12:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:01,238 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-06 08:12:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:01,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-06 08:12:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:01,241 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:01,241 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:01,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 08:12:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:12:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 08:12:01,264 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 08:12:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:01,265 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 08:12:01,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 08:12:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 08:12:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:12:01,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:01,266 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1] [2021-05-06 08:12:01,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:01,477 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-06 08:12:01,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:01,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943064199] [2021-05-06 08:12:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:01,496 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:01,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432878885] [2021-05-06 08:12:01,496 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 08:12:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:01,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:12:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:01,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:12:01,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:01,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943064199] [2021-05-06 08:12:01,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:01,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432878885] [2021-05-06 08:12:01,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432878885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:01,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:01,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 08:12:01,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526615651] [2021-05-06 08:12:01,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:01,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:01,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:01,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:01,746 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 08:12:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:01,902 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-06 08:12:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:01,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-06 08:12:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:01,905 INFO L225 Difference]: With dead ends: 66 [2021-05-06 08:12:01,905 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:12:01,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:12:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 08:12:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 08:12:01,911 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 08:12:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:01,911 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 08:12:01,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 08:12:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 08:12:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:12:01,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:01,913 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:02,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:02,129 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:02,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-06 08:12:02,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:02,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593143576] [2021-05-06 08:12:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:02,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:02,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636652509] [2021-05-06 08:12:02,150 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 08:12:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:02,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:12:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:02,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:12:02,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:02,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593143576] [2021-05-06 08:12:02,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:02,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636652509] [2021-05-06 08:12:02,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636652509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:02,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:02,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:02,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37155628] [2021-05-06 08:12:02,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:02,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:02,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:02,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:02,282 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:02,309 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-06 08:12:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:02,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 08:12:02,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:02,313 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:02,313 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:02,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 08:12:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 08:12:02,322 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 08:12:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:02,322 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 08:12:02,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 08:12:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:12:02,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:02,324 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1] [2021-05-06 08:12:02,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:02,541 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-06 08:12:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:02,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400165173] [2021-05-06 08:12:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:02,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:02,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459097240] [2021-05-06 08:12:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:12:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:02,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:12:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:02,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:02,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:02,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400165173] [2021-05-06 08:12:02,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:02,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459097240] [2021-05-06 08:12:02,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459097240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:02,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:02,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146948877] [2021-05-06 08:12:02,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:02,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:02,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:02,736 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:12:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:02,801 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-05-06 08:12:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2021-05-06 08:12:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:02,806 INFO L225 Difference]: With dead ends: 52 [2021-05-06 08:12:02,806 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 08:12:02,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 08:12:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-05-06 08:12:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 30 states have internal predecessors, (30), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:12:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 08:12:02,817 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 51 [2021-05-06 08:12:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:02,817 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 08:12:02,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:12:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 08:12:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:12:02,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:02,820 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:03,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:12:03,029 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:03,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-06 08:12:03,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:03,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392669680] [2021-05-06 08:12:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:03,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:03,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263598371] [2021-05-06 08:12:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:12:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:03,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:12:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:03,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:12:03,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392669680] [2021-05-06 08:12:03,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:03,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263598371] [2021-05-06 08:12:03,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263598371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:03,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:03,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:03,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684445342] [2021-05-06 08:12:03,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:03,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:03,221 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:03,326 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-06 08:12:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 08:12:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:03,327 INFO L225 Difference]: With dead ends: 53 [2021-05-06 08:12:03,327 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 08:12:03,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 08:12:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 08:12:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:12:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 08:12:03,329 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 54 [2021-05-06 08:12:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:03,330 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 08:12:03,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 08:12:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:12:03,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:03,330 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 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 08:12:03,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:03,545 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-06 08:12:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:03,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799429330] [2021-05-06 08:12:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:03,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:03,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621735636] [2021-05-06 08:12:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:12:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:12:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:03,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 08:12:03,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:03,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799429330] [2021-05-06 08:12:03,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:03,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621735636] [2021-05-06 08:12:03,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621735636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:03,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:03,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:03,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328618811] [2021-05-06 08:12:03,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:03,760 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:12:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:03,812 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 08:12:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 08:12:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:03,812 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:12:03,812 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:12:03,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:12:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:12:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:12:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:12:03,813 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-05-06 08:12:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:03,813 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:12:03,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:12:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:12:03,813 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:12:04,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:04,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:12:04 BasicIcfg [2021-05-06 08:12:04,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:12:04,030 INFO L168 Benchmark]: Toolchain (without parser) took 4905.18 ms. Allocated memory was 190.8 MB in the beginning and 248.5 MB in the end (delta: 57.7 MB). Free memory was 156.0 MB in the beginning and 115.0 MB in the end (delta: 41.0 MB). Peak memory consumption was 99.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:04,030 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:12:04,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.33 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 173.0 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:04,030 INFO L168 Benchmark]: Boogie Preprocessor took 40.60 ms. Allocated memory is still 190.8 MB. Free memory was 173.0 MB in the beginning and 172.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:04,030 INFO L168 Benchmark]: RCFGBuilder took 337.29 ms. Allocated memory is still 190.8 MB. Free memory was 171.5 MB in the beginning and 155.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:04,030 INFO L168 Benchmark]: IcfgTransformer took 29.36 ms. Allocated memory is still 190.8 MB. Free memory was 155.7 MB in the beginning and 154.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:04,030 INFO L168 Benchmark]: TraceAbstraction took 4252.35 ms. Allocated memory was 190.8 MB in the beginning and 248.5 MB in the end (delta: 57.7 MB). Free memory was 154.2 MB in the beginning and 115.0 MB in the end (delta: 39.2 MB). Peak memory consumption was 97.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:04,030 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.33 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 173.0 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.60 ms. Allocated memory is still 190.8 MB. Free memory was 173.0 MB in the beginning and 172.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 337.29 ms. Allocated memory is still 190.8 MB. Free memory was 171.5 MB in the beginning and 155.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.36 ms. Allocated memory is still 190.8 MB. Free memory was 155.7 MB in the beginning and 154.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4252.35 ms. Allocated memory was 190.8 MB in the beginning and 248.5 MB in the end (delta: 57.7 MB). Free memory was 154.2 MB in the beginning and 115.0 MB in the end (delta: 39.2 MB). Peak memory consumption was 97.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4209.2ms, OverallIterations: 8, TraceHistogramMax: 5, EmptinessCheckTime: 20.6ms, AutomataDifference: 729.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 275 SDtfs, 136 SDslu, 850 SDs, 0 SdLazy, 449 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 405.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 347 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 348.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 74.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 72.3ms SsaConstructionTime, 197.6ms SatisfiabilityAnalysisTime, 1177.3ms InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 349 ConstructedInterpolants, 0 QuantifiedInterpolants, 879 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1148 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 279/307 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...